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單項(xiàng)選擇題

A （）can give power to hoist or lower cargo.

A. cargo winch
B. lift winch
C. derrick
D. crane

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單項(xiàng)選擇題

Rubbish can be thrown into the water （）.

A. in a harbour
B. in any place
C. 25 miles off the land
D. 10 miles off the land

單項(xiàng)選擇題

The jumbo boom can （）.

A. lift heavy cargo
B. load and unload
C. join ropes together
D. lift light cargo

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