绞车需长时间停车时,应先停()。
A、辅助泵
B、主泵
C、电
D、过滤器
参考答案:B
The beggar the boy out of his money. [ ]
A. fooled
B. fool
C. foolish
D. be fooled
A.5A
B.5A
C.5/2A
D./2A