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單項選擇題

Chief Officer, the cargo（）is broken.

A.runner
B.run
C.running
D.runned

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單項選擇題

Wire ropes should be greased （）.

A. every month
B. every two months
C. every three months
D. A or B

單項選擇題

The （）of the derrick is 5 tons.

A.GT
B.SWL
C.DWT
D.TDW

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