由于阀片与阀座磨损漏气造成活塞式压缩机排气量不足的处理措施是()
A.研磨阀片和阀座
B.检查曲柄连杆机构
C.镗削气缸
D.调整升程高度
参考答案:A
There are lots of places of interest _____ in our city.
A.needs repairing
B.needing repaired
C.needed repairing
D.needing to be repaired
下针言当引某许,若至,语人
A.大约,表约数B.姓C.允许D.处,处所E.夸耀