1151电容式差压变送器的高、低压测量室的空腔中均充满（）.
A.被测液体
B.被测液体和气体
C.灌充液体
D.灌充液体和气体
参考答案：B
Don't speak aloud. You ______ keep quiet in the reading-room. [ ]
A. could
B. should
C. would
It's better to teach the people out of work means to earn money( ) to provide money for them.
A．than
B．as
C．most
D．more
