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單項(xiàng)選擇題

A （）is at the end of the cargo runner for picking up the load.

A.sling
B.hook
C.block
D.tackle

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單項(xiàng)選擇題

The （）is fixed at the bottom of the derrick.

A.gooseneck
B.block
C.derrick step
D.crane

單項(xiàng)選擇題

The （）is pumped onto the ship at the loading port by shore pumps.

A. oil
B. gas
C. water and fuel
D. timber

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