空压机油分至主机回油管节流孔或过滤器阻塞会导致()。
参考答案:空气中含油量高
Today is _____________.[ ]
A. suny
B. wind
C. rainy
D. March
_________for the free tickets,I would not have gone to the films so often. [ ]
A. If it is not
B. Were it not
C. Had it not been
D. If they were not