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單項選擇題

A container ship is one of the （）(干貨) ships .

A. liquid cargo
B. general cargo
C. dry cargo
D. bulk cargo

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單項選擇題

Some ships have（）(特殊職責) ,such as tugs.

A. duty
B. special duties
C. special duty
D. special

單項選擇題

（）（貨船）can be divided into two basic types.

A. Cargo ships
B. Oil ships
C. Gas carriers
D. Tramps