用如图 3 - 22 所示的文丘里流量计测量坚直水管中的流量，已知 [tex=8.571x1.214]15kSeKKTLLzQXFRw372pybTojuUCIV96YPjsmlALA7I=[/tex], 水银差压计中左右水银面的高差为[tex=4.857x1.0]bxXDhj/E06iTfq3EBHtKtBPxxEMNMDcrO9Xb+XFiwd8=[/tex], 试求水流量 [tex=0.857x1.0]hYNPl5E14DfWqq3+Am8Q4Q==[/tex][img=205x215]179a82f9dfd8e11.png[/img]

如图，在密闭容器上装有U形水银测压计，其中1、2、3点位于同一水平面上，其压强关系为（ ）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201901/19dd391e19834a64aa771ddcf6c5c7de.jpg

如图，等直径管，考虑损失，A-A断面为过流断面，B-B断面为水平面，试确定1、2、3、4各点的物理量有以下关系（ ）。<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201901/221f6e4fdefe4fc8a4dccb77b349aa72.jpg" /> A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201901/ace37017ba8545728a2182f386058ba6.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201901/70b91bd905944a2b94af05cde3e27218.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201901/2000acab49234b1b95b2c3ecc59dfd3c.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201901/3d47348e1e6f46a99ed44f691c648298.png" />

What are the comedies of Shakespeare? A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201901/1882addb95d34f3e877db8ec62e82507.png"/> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201901/4e230d2e03cc46c2b717155e90fdd081.png"/> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201901/7f4368645eff4e4b9ec89b237843dabd.png"/> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201901/5ccbfc9718084d318abfbbe254ae048b.png"/>

如图，输水管经三通管汇流，已知流量Q1=1.5m3/s，Q2=2.6m3/s，过流断面面积A2=0.2m2，断面平均流速v2等于（  ）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201901/f823e4cbdddd4a0393758dbd91e302c0.png