单项选择题
A. Yes, I do. B. No, I don’t. C.No.3 hold, I think. D. Yes, I don’t.
Do you want the derrick adjusted upwards or downwards? ...
单项选择题Do you want the derrick adjusted upwards or downwards? （）
A. Top the derrick. B. Yes, I do. C. No, I don’t. D. Sorry, I don’t know.
Bosun, I’ve never operated the hatch covers （）by hydrau...
单项选择题Bosun, I’ve never operated the hatch covers （）by hydraulic power.
A.powered B.driven C.moved D.opened
When the weather becomes bad, the hatch covers will be ...
单项选择题When the weather becomes bad, the hatch covers will be （）.
A.closed B.opened C.handled D.stopped
