压缩空气含油量过大会造成的后果是（）
A、气量变大
B、气缸和气阀动作不灵敏
C、气阀动作过快
D、吹气压力低
参考答案：B
spending your vacation in a hotel, why not try hiking in the country? [ ]
A. Instead of
B. Because of
C. As a result of
The boy ______ fifty yuan in repairing the watch yesterday.
A．cost
B．spent
C．paid
D．took
