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單項選擇題

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

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

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單項選擇題

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

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

單項選擇題

The standard size of the containers is （）high.

A.9ft
B.8ft
C.8m
D.9m

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