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單項(xiàng)選擇題

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.

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單項(xiàng)選擇題

Bosun, I’ve never operated the hatch covers （）by hydraulic power.

A.powered
B.driven
C.moved
D.opened

單項(xiàng)選擇題

When the weather becomes bad, the hatch covers will be （）.

A.closed
B.opened
C.handled
D.stopped

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