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單項(xiàng)選擇題

Pay more attention to the rising and falling of （）.

A.tide
B.water
C.sea
D.wave

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單項(xiàng)選擇題

Please tell the duty AB to lower the （）.

A.winch
B.radar
C.gangway
D.pilot ladder

單項(xiàng)選擇題

When a ship is in port, （）must keep a gangway watch.

A.officers
B.crew members
C.sailors
D.bosun

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