單項(xiàng)選擇題

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

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

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單項(xiàng)選擇題

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

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

單項(xiàng)選擇題

The most modern ship is（）（集裝箱船）.

A. dry cargo ship
B. container ship
C. liquid cargo ship
D. refrigerated ship