【判断题】( )离心泵停车时,单级泵应先停电,多级泵应先关出口阀。
【判断题】交通规划影响调查包括,对社会环境,自然环境,资源环境的影响( )
【单选题】How long is the time of the short haul flights up to?
【判断题】牛奶发酵成酸奶更有利于营养成分的吸收利用。
【判断题】This is Peter's first long haul flight. (T or F)
【单选题】What do we know about the flight?
A.
There will be a short delay.
B.
There will be a long delay.
C.
The flight has been canceled.
D.
The condition is still uncertain.