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單項選擇題

（）（滾裝船）have doors at the bow or stern.

A. Tramps
B. Container ships
C. Ro/Ro ships
D. bulk carriers

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單項選擇題

（）(送出) two head lines ,one from each side.

A. Heave away
B. Give out
C. Take in
D. Take away

單項選擇題

We must（）(后移)one metre.

A. shift aft
B. shift astern
C. move aft
D. move back

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