相关考题
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单项选择题
A （）is at the end of the cargo runner for picking up the load.
A.sling
B.hook
C.block
D.tackle -
单项选择题
The （）is fixed at the bottom of the derrick.
A.gooseneck
B.block
C.derrick step
D.crane -
单项选择题
The （）is pumped onto the ship at the loading port by shore pumps.
A. oil
B. gas
C. water and fuel
D. timber
