单项选择题

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

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

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

A. oil
B. gas
C. water and fuel
D. timber
单项选择题
The standard size of the containers is （）high.

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