单项选择题
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
After operation, drop the control levers into stowing h...
单项选择题After operation, drop the control levers into stowing hole, and （）the electric motor.
A.start B.stop C.move D.open
