【单选题】分层正注井的水进入油管后,经佩水嘴注入油层。其注水压力除了受油管摩擦阻力的影响外,还受水嘴阻力的影响,因此各层的注水压差( )。
【单选题】自动磨边机磨边时,以下哪条不会造成水嘴不喷水或水量很少,砂轮冒火星:( )。
C.
进水管未连接好,或堵塞;用自来水时,自来水断水
【多选题】通水试验在水压试验合格后,打开配水点水嘴、阀门,观察和开启阀门或水嘴放水,管道接口( )、出水通畅为合格。
【单选题】The crow was finally deceived because__________.
A.
it was not afraid of the men in the tower
B.
it did not have a number sense
C.
it could not distinguish between four and five
D.
four men left the tower
【判断题】给排水附(配)件包含水嘴、地漏、地面扫出口。( ) 判断对错
【多选题】下列不同部位安装的卫生器具,( )中的使用温度相同。