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單項(xiàng)選擇題

Never operate hatch covers when the ship is（）.

A. in port
B. anchoring
C. rolling or pitching
D. at sea

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單項(xiàng)選擇題

You are responsible for （）hatches today.

A.close
B.toclose
C.closing
D.closed

單項(xiàng)選擇題

The ship may （）to one side seriously.

A.pitch
B.roll
C.list
D.upset

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