单项选择题
I was told not to use （）in handling bagged cargoes.
A.blocks
B.hooks
C.cargo sling
D.derricks
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相关考题
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单项选择题
Before opening the hatch covers, all cleats are to be （）.
A. released
B. secured
C. taken away
D. sent out -
单项选择题
A （）is used for lifting long heavy cargo.
A.derrick
B.crane
C.jumbo boom
D.boom -
单项选择题
（）cargo is unloaded by huge grabs on cranes or by large grain elevators.
A. Dry
B. Dry general
C. Dry bulk
D. Liquid
