液体流动时,若液体内任一点处的压力不随时间而变化,就称为稳定流动。()
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普通单向阀可以代替液控单向阀使用,满足液控单向阀的所有使用要求。( )
A. 对
B. 错
假设的既没有黏性又没有可压缩性的液体是理想液体。()
A. 对
B. 错
流量指的是单位时间内流过某过流断面的液体的体积,常用的单位为m3/s或L/min。()
A. 对
B. 错
When asking your client what kind of tourist spots they prefer, which one of the the following expressions can be used?
A. It's the best place to have a distant view of the whole city.
B. Is there any place in particular you would like to go?
C. There are many places of interests in this city,