<div style="text-align: center;"><strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: blue; FONT-SIZE: 14pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">小学五年级科学下册第一单元《沉和浮》测试题答案</span></strong></div><span style="border-width: thin; table-layout: fixed; border-color: white; height: 100%;" id="SPAN1"><div style="text-align: center;"><br></div>
<span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><div style="text-align: center;"><span style="line-height: 150%; font-size: 12pt;">姓名<span style="text-decoration:underline">:</span></span><span style="text-decoration: underline;"><span style="line-height: 150%; font-size: 12pt;"> </span></span><span style="line-height: 150%; font-size: 12pt;">班别<span style="text-decoration:underline">:</span></span><span style="text-decoration: underline;"><span style="line-height: 150%; font-size: 12pt;"> </span></span><span style="line-height: 150%; font-size: 12pt;">分数<span style="text-decoration:underline">:</span></span><span style="text-decoration: underline;"><span style="line-height: 150%; font-size: 12pt;"> </span></span></div></span>
<br><strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">一、</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">填空</span></strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">1</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、同样大小的物体,我们可以改变它的(<span style="COLOR: red">重量</span>)来改变它在水里的沉与浮,如用塞子塞好的空瓶,会(<span style="COLOR: red">浮</span>)在水面上,往瓶里加些沙,增加瓶的(<span style="COLOR: red">重量</span>),它就会(<span style="COLOR: red">沉</span>)到水底了。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">2</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、同样重量的物体,我们可以改变它的(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">体积</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)来改变它在水里的沉和浮。如一块铁放在水里会(<span style="COLOR: red">下沉</span>),把它压成铁片,再制成盒子,放在水里,它会(<span style="COLOR: red">上浮</span>)。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">3</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">同样重量和大小的物体,放在清水里要下沉,放在盐水里要上浮,这说明用不同的(<span style="COLOR: red">液体</span>)也能改变物体的沉和浮。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">4</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、物体在液体中是沉还是浮,与物体的(<span style="COLOR: red">重量</span>)</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">和物体的 (<span style="COLOR: red">体积</span>)有关,还和液体的(<span style="COLOR: red">性质</span>)有关。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">5</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、浸在液体中的物体受到的浮力,其大小等于(<span style="COLOR: red">排开的水量</span></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">6</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、马铃薯在清水中(<span style="COLOR: red">下沉</span>),在盐水中可能(<span style="COLOR: red">上浮</span></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)。盐水比清水(<span style="COLOR: red">重</span>)。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">7</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、当物体的重量一定时:比较大的物体容易(<span style="COLOR: red">上浮</span>),比较小的物体容易(<span style="COLOR: red">下沉</span>)。当物体的大小一定时:比较重的物体容易(<span style="COLOR: red">下沉</span>),比较轻的物体容易(<span style="COLOR: red">上浮</span>)。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">8</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、改变物体在液体中沉浮的主要方法有:(<span style="COLOR: red">改变重量</span>)、(<span style="COLOR: red">改变体积</span>)、(<span style="COLOR: red">改变液体的性质</span>)和借助外力。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">9</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、回形针在水中是沉的,将两枚回形针穿在一起,重量变(<span style="COLOR: red">重</span>),体积变(<span style="COLOR: red">大</span>),放水中是(<span style="COLOR: red">沉的</span>),沉浮状况(<span style="COLOR: red">没有</span>)改变。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">10</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、我们把物体在水中排开水的体积叫(<span style="COLOR: red">排开的水量</span></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">11</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、原来沉的物体,想办法增大它在水中(<span style="COLOR: red">体积</span></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">),这个物体就可能变成浮的。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">12</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、一个量杯原有</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">200</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">毫升的水,把一个物体放入后,水面刻度为</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">230</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">毫升,那么这个物体排开的水量</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">(<span style="COLOR: red"> 30 </span>)</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">毫升。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">13</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、用手把泡沫塑料块往水中压,手能感受到水对泡沫塑料块有一个(<span style="COLOR: red">向上</span>)的力,这个力我们称她为水的(<span style="COLOR: red">浮力</span>)。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">14</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、当泡沫塑料块静止浮在水面时,它受到的(<span style="COLOR: red">浮力</span>)等于它受到的(<span style="COLOR: red">重力</span>),而且方向(<span style="COLOR: red">相反</span>)。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">15</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、物体浸入水中的体积越大,物体(<span style="COLOR: red">排开的水量</span>)越大,受到的浮力越(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">大</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">16</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、物体在不同的液体中受到的浮力是(<span style="COLOR: red">不一样的</span>)。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">17</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、比同体积的液体重,这个物体在这种液体中是(<span style="COLOR: red">下沉</span>)的;比同体积的液体轻,这个物体在这种液体中是(<span style="COLOR: red">上浮</span>)的。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">二、</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">判断题</span></strong><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">1</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">X</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)同一种材料构成的物体,在水中的沉浮和它的轻重、体积有关。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">2</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">X</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)在水中沉的物体可以在油中浮。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">3</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">X</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)潜水艇是靠改变自己的体积来改变沉浮的。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">4</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">X</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)某种液体烘干后有白色颗粒残留物,这种液体一定是盐水。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">5</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">(<span style="COLOR: red">√</span>)</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">变橡皮泥的形状可以改变橡皮泥在水中的沉浮。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">6</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">X</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)钩码在不同液体中受到的浮力是一样的。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">7</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">X</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)如果一立方厘米的物体重一克,在水中是沉的。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">8</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">X</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)马铃薯比同体积的清水重,所以在清水中是浮的。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">9</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">X</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)把大小不同的石块放入水中,受到的浮力相同。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">10</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">X</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)把体积相同的铁和银放入水中,受到的浮力是不相同的。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">11</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">X</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">.</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">轻的一定浮,重的一定沉。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">12</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">√</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)人在游泳时会感到有一种向上托起的力,这个力叫浮力。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">13</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">X</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)只有盐水和糖水才能使马铃薯浮起来。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">14</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">X</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)物体在不同液体中受到的浮力相同。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">15</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">√</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)比同体积的液体重的物体,在液体中下沉。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">16</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">X</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)只要水中溶解了物质就能使马铃薯浮起来。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">17</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">√</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)历史上“曹冲称象”的故事是利用的浮力原理。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">18</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">√</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)物体浸入水中的体积越大,受到的浮力也越大。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">19</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">X</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)把橡皮擦切成八分之一放入水中,橡皮擦就会浮起来。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">20</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">X</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)物体受到的浮力和重力的大小相等、方向相同。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">21</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">X</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)液体里只要溶解了其他物质,就能让马铃薯起来。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">22</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">X</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)酒精灯烧干液滴后留下许多白色的物质,同学们猜测是食盐。为了进一步确认,我们可以尝一尝来判断是否食盐。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">23</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">√</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)体积相同的铁块和铜块,它们在水中受到的浮力大小相同。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br><br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><strong>三、选择</strong></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">1</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、下列实心物体放入水中,能浮在水面上的是(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">②</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)①</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">铝球</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">②</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">干木球</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">③</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">铁球</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">2</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、用钢铁制成的轮船能浮在水面上,这是改变了(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">③</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">①</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">它的重量</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">②</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">液体浓度</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">③它的体积</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">3</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、下面哪种物体放入水中会浮起来。(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">②</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)①</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">小石头</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">②</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">萝卜</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">③</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">橡皮</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">4</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、马铃薯放入(<span style="COLOR: red">③</span></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)中会浮起来。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">①</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">淡盐水</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">②</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">清水</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">③</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">浓糖水</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">5</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、同体积的塑料块、清水、食用油比较,(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">②</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)最重。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">①</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">塑料块</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">②</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">清水</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">③食用油</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">6</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、当物体在水中受到的浮力(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">①</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)重力时就下沉</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">. </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">①小于</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">②大于③</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">等于</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">7</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、同样</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">50</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">克的方木块,(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">②</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)容易浮。①</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">体积小的</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">②</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">体积大的</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">③</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">一样</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">8</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、下列物体在水中上浮的是<span style="text-decoration:underline"><span style="COLOR: red">①②⑤⑥⑧⑩</span></span></span><span style="text-decoration:underline"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">,下沉的是</span><span style="text-decoration:underline"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span></span><span style="text-decoration:underline"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">③</span></span><span style="text-decoration:underline"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span></span><span style="text-decoration:underline"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">④</span></span><span style="text-decoration:underline"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span></span><span style="text-decoration:underline"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">⑦⑨</span></span><span style="text-decoration:underline"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">①</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">香油</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">②</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">塑料瓶盖</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">③</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">硬币</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">④蜂蜜</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">⑤乒乓球</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">⑥树叶</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">⑦铁钉</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">⑧木块</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">⑨石块</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">⑩泡沫板</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">9</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、我们会想出一些办法让潜水艇在航行中沉浮自如与</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> <span style="text-decoration:underline"> <span style="COLOR: red">A</span><span> </span></span></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">有关。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">A</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、改变轻重</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> B</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、改变高低</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> C</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、改变大小</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">10</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、塑料在(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> C</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)中会沉。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">A</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">清水</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> B</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">盐水</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> C</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">食用油</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">11</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">同体积下列物体,最重的是(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">C</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">A</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">马铃薯</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> B</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">清水</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> C</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">浓盐水</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">12</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">测得一物体在空气中重</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">19</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">牛,在水中弹簧秤的读数是</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">13</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">牛,这物体在水中是</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> <span style="COLOR: red">A</span><span> </span></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">A</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">下沉</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> B</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">上浮</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> C</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">停在水中任何深度的地方</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-fareast-font-family: ‘Times New Roman‘">13、</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">轮船浮在水面上,轮船受到的浮力(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> <span style="COLOR: red">C </span></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)重力</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">A</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">大于</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> B</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">小于</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> C</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">等于</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">14</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">浮着的物体被拉到水中,受到的浮力大小等于(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">B</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">A</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">重力</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> B</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">重力加拉力</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> C</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">重力减拉力</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">15</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">用同样多的橡皮泥做船,甲做的橡皮泥能承受</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">22</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">个垫圈,乙做的能多承受</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">2</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">个,排水量大小比较(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> <span style="COLOR: red">B</span></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> A</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">甲大</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> B</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">乙</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">大</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> C</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">一样大</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">16</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">、</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">潜水艇在水下时,在下沉过程中,受到浮力变化情况(</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> <span style="COLOR: red">B</span><span> </span></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">)</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">A</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">慢慢变大</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> B </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">不变</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> C</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">逐渐变小</span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><strong>四、连线题:请用线将事物和对应的改变物体在液体中沉浮的方法连接起来</strong></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><v:line id="_x0000_s1027" to="," from=",225pt"></v:line><v:shapetype id="_x0000_t75" stroked="f" filled="f" path="m@4@5l@4@11@9@11@9@5xe" o:preferrelative="t" o:spt="75" coord=""><v:stroke joinstyle="miter"></v:stroke><v:formulas><v:f eqn="if lineDrawn pixelLineWidth 0"></v:f><v:f eqn="sum @0 1 0"></v:f><v:f eqn="sum 0 0 @1"></v:f><v:f eqn="prod @2 1 2"></v:f><v:f eqn="prod @3 21600 pixelWidth"></v:f><v:f eqn="prod @3 21600 pixelHeight"></v:f><v:f eqn="sum @0 0 1"></v:f><v:f eqn="prod @6 1 2"></v:f><v:f eqn="prod @7 21600 pixelWidth"></v:f><v:f eqn="sum @8 21600 0"></v:f><v:f eqn="prod @7 21600 pixelHeight"></v:f><v:f eqn="sum @10 21600 0"></v:f></v:formulas><v:path o:connecttype="rect" gradientshapeok="t" o:extrusionok="f"></v:path><o:lock aspectratio="t" v:ext="edit"></o:lock></v:shapetype></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><v:line id="_x0000_s1028" to="3in,264pt" from="108pt,225pt"></v:line></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">淹不死人的湖</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">改变物体的大小</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><v:line id="_x0000_s1026" to="," from=",276pt"></v:line></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">钢铁造的轮船</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">改变物体的重量</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">潜水艇</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"> </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">改变液体的密度</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br><br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><strong>五、原理分析</strong></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">钢铁在水中是沉的,为什么钢铁造的大轮船却能浮在水面上?</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">答:</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">因为钢铁制造的船改变了原来钢铁的体积,使排开的水量增大,即增大了水的浮力。所以</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">钢铁造的大轮船却能浮在水面上</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br><br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"><strong>六、简答题</strong></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">1. </span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">一块橡皮泥放入水中是下沉的,你有什么办法让橡皮泥浮起来吗?(看谁的办法多)</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">答:略</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br><br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">2.</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">请利用所学的知识解释为什么“潜水艇既能在水面航行,又能在水下航行”。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br>
<br><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">答:</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">(潜水艇)是在体积不变的情况下,通过改变重量来实现沉浮的,所以</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; COLOR: red; FONT-SIZE: 12pt; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">“潜水艇既能在水面航行,又能在水下航行”。</span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt"></span><br><br></span>
五年级下