[err:数据源标签'PE.DataSource id="cone" datasource="资料_内容页" itemId="123388" xslt="true" wu="0"'返回数据错,原因:名称中不能包含“=”字符(十六进制值 0x3D)。 行 17,位置 1081。,源码:1233885
<meta http-equiv="refresh" content="0;url=/Item/123388.aspx?wu=1" />
1268【精品】备战2020全国中考物理真题分类全解析(150套):专题1.9 压强(原卷版和解析版)34.35MB34.35Bdocczwlzx魏强czwlzx/UploadFiles/UserPic/UserAvatars/15219_150_150.jpg
<script language="JavaScript" type="text/JavaScript" src="/Common/GetHits.aspx?id=123388"></script>
<script language="JavaScript" type="text/JavaScript" src="/Common/GetHits.aspx?hitstype=dayhits&id=123388"></script>
<script language="JavaScript" type="text/JavaScript" src="/Common/GetHits.aspx?hitstype=weekhits&id=123388"></script>
<script language="JavaScript" type="text/JavaScript" src="/Common/GetHits.aspx?hitstype=monthhits&id=123388"></script>
<script language="JavaScript" type="text/JavaScript" src="/Common/GetBrowseTimes.aspx?id=123388"></script>
<img src="/images/star4.jpg" />
魏强1【精品】备战2020全国中考物理真题分类全解析(150套),压强2020年02月04日/UploadFiles/nopic.gif
一、选择题1.(2019·绥化)如图所示四个实例中,属于增大压强的是( ) A 一、选择题1.(2019·绥化)如图所示四个实例中,属于增大压强的是( ) A B C DA.滑雪板面积较大 B.骆驼宽大的脚掌 C.铁轨下铺设枕木 D.破窗锤敲击端做成锥状【答案】D【解析】A、滑雪板面积较大,是在压力一定时,通过增大受力面积来减小压强的,故A不符合题意;B、骆驼宽大的脚掌,是在压力一定时,通过增大受力面积来减小压强的
【内容简介】一、选择题1.(2019·绥化)如图所示四个实例中,属于增大压强的是( ) A B C DA.滑雪板面积较大 B.骆驼宽大的脚掌 C.铁轨下铺设枕木 D.破窗锤敲击端做成锥状【答案】D【解析】A、滑雪板面积较大,是在压力一定时,通过增大受力面积来减小压强的,故A不符合题意;B、骆驼宽大的脚掌,是在压力一定时,通过增大受力面积来减小压强的,故B不符合题意;C、铁轨下铺设枕木,是在压力一定时,通过增大受力面积来减小压强的,故C不符合题意;D、破窗锤敲击端做成锥状,是在压力一定时,通过减小受力面积来增大压强,故D符合题意。2.(2019·北京)两个完全相同的圆柱形容器静止放在水平桌面上,其中分别装有质量相等的水和酒精,液面高度如图所示。甲容器中液体对容器底部的压强和压力分别为p1和F1,乙容器中液体对容器底部的压强和压力分别为p2和F2;甲容器对桌面的压强和压力分别为p1′和F1′,乙容器对桌面的压强和压力分别为p2′和F2′,已知水的密度大于酒精的密度,则下列判断中正确的是( ) 甲 乙A.p1<p2、F1<F2 B.p1<p2、F1=F2 C.p1'=p2′、F1′=F2′ D.p1′>p2′,F1′>F2′【答案】C【解析】(1)分别装有质量相等的水和酒精,液柱对容器底的压力等于液柱的重力,根据G=mg,因质量相同,故F1=F2;因两个完全相同的圆柱形容器,故液柱的受力面积S相同,根据p=,液柱对容器底的压强:p1=p2;(2)容器对水平桌面的压力等于容器和液体的重力,故两容器对桌面的压力相等,F1′=F2′,根据p=,两容器对桌面的压强相等,p1′=p2′,只有C正确。3.(2019·盐城)如图所示为长江某水坝的示意图。水坝左侧水面高,B和C两点处于同一高度,A和C两点到各自液面的距离相等,水在A、B和C三点产生的压强分别为pA、pB和pC,则( )A.pApC C. pA>pB=pC D.pA=pC一、选择题1.(2019·绥化)如图所示四个实例中,属于增大压强的是( )            A  
<p><em>所属专辑:</em>
<a href='/Special_207/Index.aspx' target='_blank'>
【精品】备战2020全国中考物理真题分类全解析(150套)(44个专辑)
</a>
</p>
下载地址1|sj/2020/2/20202492417.rar<p style=";line-height:150%"><strong><span style="line-height: 150%;font-family: 宋体">一、选择题</span></strong></p><p style=";line-height:150%"><span style="line-height: 150%">1</span><span style="line-height: 150%;font-family: 宋体">.(</span><span style="line-height: 150%">2019</span><span style="line-height: 150%">·</span><span style="line-height: 150%;font-family: 宋体">绥化)如图所示四个实例中,属于增大压强的是( )</span></p><p style=";line-height:150%"><span style="line-height: 150%"> <img width="164" height="90" src="http://www.czwlzx.com/UEditor/themes/default/images/spacer.gif" alt="学科网(www.zxxk.com)--教育资源门户,提供试题试卷、教案、课件、教学论文、素材等各类教学资源库下载,还有大量丰富的教学资讯!" style="background:url(http://www.czwlzx.com/UEditor/lang/zh-cn/images/localimage.png) no-repeat center center;border:1px solid #ddd" /><img width="100" height="91" src="http://www.czwlzx.com/UEditor/themes/default/images/spacer.gif" alt="学科网(www.zxxk.com)--教育资源门户,提供试题试卷、教案、课件、教学论文、素材等各类教学资源库下载,还有大量丰富的教学资讯!" style="background:url(http://www.czwlzx.com/UEditor/themes/default/images/word.gif) no-repeat center center;border:1px solid #ddd" /> <img width="92" height="91" src="http://www.czwlzx.com/UEditor/themes/default/images/spacer.gif" alt="学科网(www.zxxk.com)--教育资源门户,提供试题试卷、教案、课件、教学论文、素材等各类教学资源库下载,还有大量丰富的教学资讯!" style="background:url(http://www.czwlzx.com/UEditor/themes/default/images/word.gif) no-repeat center center;border:1px solid #ddd" /> <img width="92" height="91" src="http://www.czwlzx.com/UEditor/themes/default/images/spacer.gif" alt="学科网(www.zxxk.com)--教育资源门户,提供试题试卷、教案、课件、教学论文、素材等各类教学资源库下载,还有大量丰富的教学资讯!" style="background:url(http://www.czwlzx.com/UEditor/themes/default/images/word.gif) no-repeat center center;border:1px solid #ddd" /></span></p><p style="text-indent: 70px;line-height: 150%"><span style="line-height: 150%">A B C D</span></p><p style=";line-height: 150%"><span style="line-height: 150%">A</span><span style="line-height: 150%;font-family: 宋体">.滑雪板面积较大</span><span style="line-height: 150%"> B</span><span style="line-height: 150%;font-family: 宋体">.骆驼宽大的脚掌</span><span style="line-height: 150%"> </span></p><p style=";line-height: 150%"><span style="line-height: 150%">C</span><span style="line-height: 150%;font-family: 宋体">.铁轨下铺设枕木</span><span style="line-height: 150%"> D</span><span style="line-height: 150%;font-family: 宋体">.破窗锤敲击端做成锥状</span></p><p style=";line-height:150%"><span style=";line-height:150%;font-family:宋体;color:red">【答案】</span><span style=";line-height:150%;color:red">D</span></p><p style=";line-height:150%"><span style=";line-height:150%;font-family:宋体;color:red">【解析】</span></p><p style=";line-height:150%"><span style=";line-height:150%;color:red">A</span><span style=";line-height:150%;font-family:宋体;color:red">、滑雪板面积较大,是在压力一定时,通过增大受力面积来减小压强的,故</span><span style=";line-height:150%;color:red">A</span><span style=";line-height:150%;font-family:宋体;color:red">不符合题意;</span></p><p style=";line-height:150%"><span style=";line-height:150%;color:red">B</span><span style=";line-height:150%;font-family:宋体;color:red">、骆驼宽大的脚掌,是在压力一定时,通过增大受力面积来减小压强的,故</span><span style=";line-height:150%;color:red">B</span><span style=";line-height:150%;font-family:宋体;color:red">不符合题意;</span></p><p style=";line-height:150%"><span style=";line-height:150%;color:red">C</span><span style=";line-height:150%;font-family:宋体;color:red">、铁轨下铺设枕木,是在压力一定时,通过增大受力面积来减小压强的,故</span><span style=";line-height:150%;color:red">C</span><span style=";line-height:150%;font-family:宋体;color:red">不符合题意;</span></p><p style=";line-height:150%"><span style=";line-height:150%;color:red">D</span><span style=";line-height:150%;font-family:宋体;color:red">、破窗锤敲击端做成锥状,是在压力一定时,通过减小受力面积来增大压强,故</span><span style=";line-height:150%;color:red">D</span><span style=";line-height:150%;font-family:宋体;color:red">符合题意。</span></p><p style=";line-height:150%"><span style="line-height: 150%">2</span><span style="line-height: 150%;font-family: 宋体">.</span><span style="line-height: 150%">(2019·</span><span style="line-height: 150%;font-family: 宋体">北京</span><span style="line-height: 150%">)</span><span style="line-height: 150%;font-family: 宋体">两个完全相同的圆柱形容器静止放在水平桌面上,其中分别装有质量相等的水和酒精,液面高度如图所示。甲容器中液体对容器底部的压强和压力分别为</span><em><span style="line-height: 150%">p</span></em><sub><span style="line-height: 150%">1</span></sub><span style="line-height: 150%;font-family: 宋体">和</span><em><span style="line-height: 150%">F</span></em><sub><span style="line-height: 150%">1</span></sub><span style="line-height: 150%;font-family: 宋体">,乙容器中液体对容器底部的压强和压力分别为</span><em><span style="line-height: 150%">p</span></em><sub><span style="line-height: 150%">2</span></sub><span style="line-height: 150%;font-family: 宋体">和</span><em><span style="line-height: 150%">F</span></em><sub><span style="line-height: 150%">2</span></sub><span style="line-height: 150%;font-family: 宋体">;甲容器对桌面的压强和压力分别为</span><em><span style="line-height: 150%">p</span></em><sub><span style="line-height: 150%">1</span></sub><span style="line-height: 150%">′</span><span style="line-height: 150%;font-family: 宋体">和</span><em><span style="line-height: 150%">F</span></em><sub><span style="line-height: 150%">1</span></sub><span style="line-height: 150%">′</span><span style="line-height: 150%;font-family: 宋体">,乙容器对桌面的压强和压力分别为</span><em><span style="line-height: 150%">p</span></em><sub><span style="line-height: 150%">2</span></sub><span style="line-height: 150%">′</span><span style="line-height: 150%;font-family: 宋体">和</span><em><span style="line-height: 150%">F</span></em><sub><span style="line-height: 150%">2</span></sub><span style="line-height: 150%">′</span><span style="line-height: 150%;font-family: 宋体">,已知水的密度大于酒精的密度,则下列判断中正确的是( )</span></p><p style="text-align:center;line-height:150%"><span style=";line-height: 150%;color:red"><img width="130" height="76" src="http://www.czwlzx.com/UEditor/themes/default/images/spacer.gif" alt="学科网(www.zxxk.com)--教育资源门户,提供试题试卷、教案、课件、教学论文、素材等各类教学资源库下载,还有大量丰富的教学资讯!" style="background:url(http://www.czwlzx.com/UEditor/lang/zh-cn/images/localimage.png) no-repeat center center;border:1px solid #ddd" /></span></p><p style=";line-height:150%"><span style=";line-height:150%;color:red"> </span><span style="line-height: 150%"> </span><span style="line-height: 150%;font-family: 宋体">甲</span><span style="line-height: 150%"> </span><span style="line-height: 150%;font-family: 宋体">乙</span></p><p style=";line-height: 150%"><span style="line-height: 150%">A</span><span style="line-height: 150%;font-family: 宋体">.</span><em><span style="line-height: 150%">p</span></em><sub><span style="line-height: 150%">1</span></sub><span style="line-height: 150%;font-family: 宋体"><</span><em><span style="line-height: 150%">p</span></em><sub><span style="line-height: 150%">2</span></sub><span style="line-height: 150%;font-family: 宋体">、</span><em><span style="line-height: 150%">F</span></em><sub><span style="line-height: 150%">1</span></sub><span style="line-height: 150%;font-family: 宋体"><</span><em><span style="line-height: 150%">F</span></em><sub><span style="line-height: 150%">2</span></sub><span style="line-height: 150%"> B</span><span style="line-height: 150%;font-family: 宋体">.</span><em><span style="line-height: 150%">p</span></em><sub><span style="line-height: 150%">1</span></sub><span style="line-height: 150%;font-family: 宋体"><</span><em><span style="line-height: 150%">p</span></em><sub><span style="line-height: 150%">2</span></sub><span style="line-height: 150%;font-family: 宋体">、</span><em><span style="line-height: 150%">F</span></em><sub><span style="line-height: 150%">1</span></sub><span style="line-height: 150%;font-family: 宋体">=</span><em><span style="line-height: 150%">F</span></em><sub><span style="line-height: 150%">2</span></sub><span style="line-height: 150%"> </span></p><p style=";line-height: 150%"><span style="line-height: 150%">C</span><span style="line-height: 150%;font-family: 宋体">.</span><em><span style="line-height: 150%">p</span></em><sub><span style="line-height: 150%">1</span></sub><span style="line-height: 150%">'</span><span style="line-height: 150%;font-family: 宋体">=</span><em><span style="line-height: 150%">p</span></em><sub><span style="line-height: 150%">2</span></sub><span style="line-height: 150%">′</span><span style="line-height: 150%;font-family: 宋体">、</span><em><span style="line-height: 150%">F</span></em><sub><span style="line-height: 150%">1</span></sub><span style="line-height: 150%">′</span><span style="line-height: 150%;font-family: 宋体">=</span><em><span style="line-height: 150%">F</span></em><sub><span style="line-height: 150%">2</span></sub><span style="line-height: 150%">′ D</span><span style="line-height: 150%;font-family: 宋体">.</span><em><span style="line-height: 150%">p</span></em><sub><span style="line-height: 150%">1</span></sub><span style="line-height: 150%">′</span><span style="line-height: 150%;font-family: 宋体">></span><em><span style="line-height: 150%">p</span></em><sub><span style="line-height: 150%">2</span></sub><span style="line-height: 150%">′</span><span style="line-height: 150%;font-family: 宋体">,</span><em><span style="line-height: 150%">F</span></em><sub><span style="line-height: 150%">1</span></sub><span style="line-height: 150%">′</span><span style="line-height: 150%;font-family: 宋体">></span><em><span style="line-height: 150%">F</span></em><sub><span style="line-height: 150%">2</span></sub><span style="line-height: 150%">′</span></p><p style=";line-height:150%"><span style=";line-height:150%;font-family:宋体;color:red">【答案】</span><span style=";line-height:150%;color:red">C</span></p><p style=";line-height:150%"><span style=";line-height:150%;font-family:宋体;color:red">【解析】</span></p><p style=";line-height:150%"><span style=";line-height:150%;font-family:宋体;color:red">(</span><span style=";line-height:150%;color:red">1</span><span style=";line-height:150%;font-family:宋体;color:red">)分别装有质量相等的水和酒精,液柱对容器底的压力等于液柱的重力,根据</span><em><span style=";line-height:150%;color:red">G</span></em><span style=";line-height:150%;font-family:宋体;color:red">=</span><em><span style=";line-height:150%;color:red">mg</span></em><span style=";line-height:150%;font-family:宋体;color:red">,因质量相同,故</span><em><span style=";line-height:150%;color:red">F</span></em><sub><span style=";line-height:150%;color:red">1</span></sub><span style=";line-height:150%;font-family:宋体;color:red">=</span><em><span style=";line-height:150%;color:red">F</span></em><sub><span style=";line-height:150%;color:red">2</span></sub><span style=";line-height:150%;font-family:宋体;color:red">;因两个完全相同的圆柱形容器,故液柱的受力面积</span><em><span style=";line-height:150%;color:red">S</span></em><span style=";line-height:150%;font-family:宋体;color:red">相同,根据</span><em><span style=";line-height:150%;color:red">p</span></em><span style=";line-height:150%;font-family:宋体;color:red">=</span><span style=";line-height:150%;font-family:宋体;color:red">,液柱对容器底的压强:</span><em><span style=";line-height:150%;color:red">p</span></em><sub><span style=";line-height:150%;color:red">1</span></sub><span style=";line-height:150%;font-family:宋体;color:red">=</span><em><span style=";line-height:150%;color:red">p</span></em><sub><span style=";line-height:150%;color:red">2</span></sub><span style=";line-height:150%;font-family:宋体;color:red">;</span></p><p style=";line-height:150%"><span style=";line-height:150%;font-family:宋体;color:red">(</span><span style=";line-height:150%;color:red">2</span><span style=";line-height:150%;font-family:宋体;color:red">)容器对水平桌面的压力等于容器和液体的重力,故两容器对桌面的压力相等,</span><em><span style=";line-height:150%;color:red">F</span></em><sub><span style=";line-height:150%;color:red">1</span></sub><span style=";line-height:150%;color:red">′</span><span style=";line-height:150%;font-family:宋体;color:red">=</span><em><span style=";line-height:150%;color:red">F</span></em><sub><span style=";line-height:150%;color:red">2</span></sub><span style=";line-height:150%;color:red">′</span><span style=";line-height:150%;font-family:宋体;color:red">,根据</span><em><span style=";line-height:150%;color:red">p</span></em><span style=";line-height:150%;font-family:宋体;color:red">=</span><span style=";line-height:150%;font-family:宋体;color:red">,两容器对桌面的压强相等,</span><em><span style=";line-height:150%;color:red">p</span></em><sub><span style=";line-height:150%;color:red">1</span></sub><span style=";line-height:150%;color:red">′</span><span style=";line-height:150%;font-family:宋体;color:red">=</span><em><span style=";line-height:150%;color:red">p</span></em><sub><span style=";line-height:150%;color:red">2</span></sub><span style=";line-height:150%;color:red">′</span><span style=";line-height:150%;font-family:宋体;color:red">,只有</span><span style=";line-height:150%;color:red">C</span><span style=";line-height:150%;font-family:宋体;color:red">正确。</span></p><p style=";line-height:150%"><span style="line-height: 150%">3</span><span style="line-height: 150%;font-family: 宋体">.</span><span style="line-height: 150%">(2019·</span><span style="line-height: 150%;font-family: 宋体">盐城</span><span style="line-height: 150%">)</span><span style="line-height: 150%;font-family: 宋体">如图所示为长江某水坝的示意图。水坝左侧水面高,</span><em><span style="line-height: 150%">B</span></em><span style="line-height: 150%;font-family: 宋体">和</span><em><span style="line-height: 150%">C</span></em><span style="line-height: 150%;font-family: 宋体">两点处于同一高度,</span><em><span style="line-height: 150%">A</span></em><span style="line-height: 150%;font-family: 宋体">和</span><em><span style="line-height: 150%">C</span></em><span style="line-height: 150%;font-family: 宋体">两点到各自液面的距离相等,水在</span><em><span style="line-height: 150%">A</span></em><span style="line-height: 150%;font-family: 宋体">、</span><em><span style="line-height: 150%">B</span></em><span style="line-height: 150%;font-family: 宋体">和</span><em><span style="line-height: 150%">C</span></em><span style="line-height: 150%;font-family: 宋体">三点产生的压强分别为</span><em><span style="line-height: 150%">p</span></em><sub><span style="line-height: 150%">A</span></sub><span style="line-height: 150%;font-family: 宋体">、</span><em><span style="line-height: 150%">p</span></em><sub><span style="line-height: 150%">B</span></sub><span style="line-height: 150%;font-family: 宋体">和</span><em><span style="line-height: 150%">p</span></em><sub><span style="line-height: 150%">C</span></sub><span style="line-height: 150%;font-family: 宋体">,则(</span><span style="line-height: 150%"> </span><span style="line-height: 150%;font-family: 宋体">)</span></p><p style="text-align:center;line-height:150%"><span style="line-height: 150%"><img width="112" height="89" src="http://www.czwlzx.com/UEditor/themes/default/images/spacer.gif" alt="学科网(www.zxxk.com)--教育资源门户,提供试题试卷、教案、课件、教学论文、素材等各类教学资源库下载,还有大量丰富的教学资讯!" style="background:url(http://www.czwlzx.com/UEditor/themes/default/images/word.gif) no-repeat center center;border:1px solid #ddd" /></span></p><p style=";line-height:150%"><span style="line-height: 150%">A</span><span style="line-height: 150%;font-family: 宋体">.</span><span style="line-height: 150%"><em>p</em><sub>A</sub><<em>p</em><sub>B</sub>=<em>p</em><sub>C</sub> B</span><span style="line-height: 150%;font-family: 宋体">.</span><span style="line-height: 150%"><em>p</em><sub>A</sub>=<em>p</em><sub>B</sub>><em>p</em><sub>C</sub> C</span><span style="line-height: 150%;font-family: 宋体">.</span><em><span style="line-height: 150%"> p</span></em><sub><span style="line-height: 150%">A</span></sub><span style="line-height: 150%">><em>p</em><sub>B</sub>=<em>p</em><sub>C</sub> D</span><span style="line-height: 150%;font-family: 宋体">.</span><em><span style="line-height: 150%">p<sub>A</sub></span></em><span style="line-height: 150%">=<em>p</em><sub>C</sub><<em>p</em><sub>B</sub></span></p><p style=";line-height:150%"><span style=";line-height:150%;font-family:宋体;color:red">【答案】</span><span style=";line-height:150%;color:red">D </span></p><p style=";line-height:150%"><span style=";line-height:150%;font-family:宋体;color:red">【解析】在同一种液体中,液体的压强随深度的增加而增大,在同一深度处压强相等。</span><em><span style=";line-height:150%;color:red">A</span></em><span style=";line-height:150%;font-family:宋体;color:red">和</span><em><span style=";line-height:150%;color:red">C</span></em><span style=";line-height:150%;font-family:宋体;color:red">两点到各自液面的距离相等,则</span><em><span style=";line-height:150%;color:red">A</span></em><span style=";line-height:150%;font-family:宋体;color:red">和</span><em><span style=";line-height:150%;color:red">C</span></em><span style=";line-height:150%;font-family:宋体;color:red">点的深度相等,因此压强相等,</span><em><span style=";line-height:150%;color:red">B</span></em><span style=";line-height:150%;font-family:宋体;color:red">点比</span><em><span style=";line-height:150%;color:red">A</span></em><span style=";line-height:150%;font-family:宋体;color:red">点所处深度要大,则</span><em><span style=";line-height:150%;color:red">B</span></em><span style=";line-height:150%;font-family:宋体;color:red">点液体压强最大,故选</span><span style=";line-height:150%;color:red">D</span><span style=";line-height:150%;font-family:宋体;color:red">。</span></p><p style=";line-height:150%;vertical-align: middle"><span style="font-size:15px;line-height:150%">4</span><span style="font-size:15px;line-height:150%">.</span><span style="line-height: 150%">(2019·</span><span style="line-height: 150%;font-family: 宋体">青岛</span><span style="line-height: 150%">)</span><span style="font-size:15px;line-height:150%">如图为盆景的一个自动供水装置。用一个塑料瓶装满水倒放在盆景盘中,瓶口刚刚被水浸没。当盘中的水位下降到使瓶口露出水面时,空气进入瓶中,瓶中就会有水流出,使盘中的水位升高,瓶口又被浸没,瓶中的水不再流出,这样盆景盘中的水位可以保持一定高度。使水不会全部流出而能保留在瓶中的原因是</span><span style="line-height: 150%;font-family: 宋体">( )</span></p><p style="text-align:center;line-height:150%;vertical-align:middle"><span style="line-height: 150%"><img width="132" height="74" src="http://www.czwlzx.com/UEditor/themes/default/images/spacer.gif" alt="学科网(www.zxxk.com)--教育资源门户,提供试题试卷、教案、课件、教学论文、素材等各类教学资源库下载,还有大量丰富的教学资讯!" style="background:url(http://www.czwlzx.com/UEditor/lang/zh-cn/images/localimage.png) no-repeat center center;border:1px solid #ddd" /></span></p><p style=";line-height:150%;vertical-align: middle"><span style="font-size:15px;line-height:150%"> A</span><span style="font-size:15px;line-height:150%;font-family:宋体">.</span><span style="font-size:15px;line-height:150%">瓶口太小,水不易流出</span></p><p style=";line-height:150%;vertical-align: middle"><span style="font-size:15px;line-height:150%"> B</span><span style="font-size:15px;line-height:150%;font-family:宋体">.</span><span style="font-size:15px;line-height:150%">外界大气压强等于瓶内水的压强</span></p><p style=";line-height:150%;vertical-align: middle"><span style="font-size:15px;line-height:150%"> C</span><span style="font-size:15px;line-height:150%;font-family:宋体">.</span><span style="font-size:15px;line-height:150%">外界大气压强等于瓶内空气的压强</span></p><p style=";line-height:150%;vertical-align: middle"><span style="font-size:15px;line-height:150%"> D</span><span style="font-size:15px;line-height:150%;font-family:宋体">.</span><span style="font-size:15px;line-height:150%">外界大气压强等于瓶内空气的压强与水的压强之和</span></p><p style=";line-height:150%;vertical-align: middle"><span style=";line-height:150%;font-family: 宋体;color:red">【答案】</span><span style=";line-height:150%;color:red">D </span></p><p style=";line-height:150%"><span style=";line-height:150%;font-family:宋体;color:red">【解析】瓶口所在的水面,在瓶口内受到瓶内水和瓶内气体的压强,瓶口外受到的大气压的作用,当内外压强相等时,瓶内的水不会流出,使盆景中的水位保持一定。当盆中的水蒸发掉一部分后,瓶口外水面下降,有气泡进入瓶中,使气体压强增大,瓶中的部分水流出,当水面与瓶口相平时,内外压强再次相等,水面不再上升,故答案</span><span style=";line-height:150%;color:red">D</span><span style=";line-height:150%;font-family:宋体;color:red">正确。</span></p><p><br /></p>不限不限试题试卷免费doc
<img src="/images/nopic.gif" alt="%e3%80%90%e7%b2%be%e5%93%81%e3%80%91%e5%a4%87%e6%88%982020%e5%85%a8%e5%9b%bd%e4%b8%ad%e8%80%83%e7%89%a9%e7%90%86%e7%9c%9f%e9%a2%98%e5%88%86%e7%b1%bb%e5%85%a8%e8%a7%a3%e6%9e%90%ef%bc%88150%e5%a5%97%ef%bc%89%ef%bc%9a%e4%b8%93%e9%a2%981.9+%e5%8e%8b%e5%bc%ba%ef%bc%88%e5%8e%9f%e5%8d%b7%e7%89%88%e5%92%8c%e8%a7%a3%e6%9e%90%e7%89%88%ef%bc%89" border="0" />
/UploadFiles/sj/2020/2/20202492417.rar
<script type="text/javascript" src="/cuplayer4/js/swfobject.js"></script>
<div class="video" id="CuPlayer"><b><img src="/cuplayer4/images/loading.gif" /> 网页视频播放器加载中,请稍后...<a href="http://www.cuplayer.com/cuplayer" target="_blank">点此升级>></a></b></div>
<script type="text/javascript">
var so = new SWFObject("/cuplayer4/player.swf","myCuPlayer","940","465","9","#000000");
so.addParam("allowfullscreen","true");
so.addParam("allowscriptaccess","always");
so.addParam("wmode","opaque");
so.addParam("quality","high");
so.addParam("salign","lt");
so.addVariable("JcScpAutoPlay","no"); //是否自动播放
so.addVariable("JcScpShowRightmenu","no"); //
so.addVariable("JcScpVideoPath","/UploadFiles/sj/2020/2/20202492417.rar"); //视频文件地址
so.addVariable("JcScpImg","");//视频缩略图
so.addVariable("JcScpSharetitle","酷播V4.0(CuPlayerV4.0)版使用官方演示实例");
so.write("CuPlayer");
</script>
<script language=javascript src="/cuplayer4/js/action.js" type=text/javascript></script>
<script type="text/javascript" src="/cuplayer3/images/swfobject.js"></script>
<div class="video" id="CuPlayer"><b><img src="/cuplayer3/images/loading.gif" /> 网页视频播放器加载中,请稍后...<a href="http://www.cuplayer.com/cuplayer" target="_blank">点此升级>></a></b></div>
<script type="text/javascript">
var so = new SWFObject("/cuplayer3/CuPlayerMiniV3_Black_S.swf","myCuPlayer","862","485","9","#000000");
so.addParam("allowfullscreen","true");
so.addParam("allowscriptaccess","always");
so.addParam("wmode","opaque");
so.addParam("quality","high");
so.addParam("salign","lt");
so.addVariable("CuPlayerFile","/UploadFiles/sj/2020/2/20202492417.rar"); //视频文件地址
so.addVariable("CuPlayerImage","");//视频缩略图
so.addVariable("CuPlayerShowImage","true");
so.addVariable("CuPlayerWidth","862");
so.addVariable("CuPlayerHeight","485");
so.addVariable("CuPlayerAutoPlay","false");
so.addVariable("CuPlayerAutoRepeat","true");
so.addVariable("CuPlayerShowControl","true");
so.addVariable("CuPlayerAutoHideControl","false");
so.addVariable("CuPlayerAutoHideTime","6");
so.addVariable("CuPlayerVolume","80");
so.addVariable("CuPlayerGetNext","false");
so.write("CuPlayer");
</script>
<script language=javascript src="/cuplayer4/js/action.js" type=text/javascript></script>
]
{PE.Field id="cone" fieldname="Title" /}-试卷中心-初中物理在线
{PE.Field id="cone" fieldname="gourl" /}
{PE.Label id="顶部-试卷" currentId="{PE.Field id="cone" fieldname="NodeID" /}"/}
当前位置:首页 > {PE.Label id="当前位置导航" nodeId="{PE.Field id="cone" fieldname="NodeID" /}" /} > 内容详情
{PE.Field id="cone" fieldname="Title" /}
{PE.Field id="cone" fieldname="SoftIntro" /}
只能预览部分内容,查看全部内容需要下载哦~
下载地址1
{PE.Field id="cone" fieldname="infopoint" /}个点券
- {PE.Label id="上一篇" unit="份试卷" itemId="123388" nodeArray="{PE.Field id="cone" fieldname="NodeID" /}" titleLength="90" /}
- {PE.Label id="下一篇" unit="份试卷" itemId="123388" nodeArray="{PE.Field id="cone" fieldname="NodeID" /}" titleLength="90" /}
资料审核:{PE.Field id="cone" fieldname="user" /}
{PE.Field id="cone" fieldname="special" /}
资料格式:{PE.Field id="cone" fieldname="ico" /}
资料版本:{PE.Field id="cone" fieldname="banben" /}
适用地区:{PE.Field id="cone" fieldname="area" /}
文件大小:{PE.Field id="cone" fieldname="SoftSize" /}{PE.Field id="cone" fieldname="SoftSizeUnit" /}
资料作者:{PE.Field id="cone" fieldname="author" /}
审核人员:{PE.Field id="cone" fieldname="editor" /}
下载帮助:
- 下载说明:0点券资源无需下载权限,游客可以直接下载。
- 有点券资源为本站精品课件,只提供给vip会员下载,有效期式vip会员可以在有效期内下载本站所有资源。
查看 【申请有效期vip会员方法】
。
-
- 如果您无法下载到本资料,请先参照以下说明检查:
- 1、所有资料必须是登录后才能下载。
- 2、精品资料下载需要下载权限,请确保您是本站vip会员才可下载。有效期vip会员只受有效期限制,不受点券影响,有效期内即使点券用完,仍可继续下载。
- 4、如果浏览器启用了拦截弹出窗口,此功能有可能造成下载失败,请临时关闭此功能。本站所有资源下载也无需打开任何下载软件。
- 5、如果下载的是word文档,直接可用word软件打开;如果是压缩资料包,下载后请先用winrar解压软件解压,再使用对应软件word打开。
- 6、以上步骤检查后均无法解决问题,您可以到[帮助中心]寻找答案或向网站客服人员寻求支持。
展开
{PE.Field id="cone" fieldname="Title" /}
{PE.Label id="A评论标签" nodeId="{PE.Field id="cone" fieldname="NodeID" /}" /}
用户评论
(欢迎您的评论,评论有奖励哟!)