單項(xiàng)選擇題

When the winch is in trouble, the sailor must call the （）(電工) to repair it.

A.carpenter
B.rating
C.electrician
D.bosun

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單項(xiàng)選擇題

Sailors should know the （）(安全工作負(fù)荷量)of derricks.

A. safe working load
B. safety work load
C. safe work load
D. safe working loading

單項(xiàng)選擇題

Liquid bulk cargo is loaded and discharged by （）(泵).

A.pipes
B.tubes
C.buckets
D.pumps