单项选择题
A.sweep B.sweeping C.sweepings D.dunnage
I was told not to use （）in handling bagged cargoes.A.bl...
单项选择题I was told not to use （）in handling bagged cargoes.
A.blocks B.hooks C.cargo sling D.derricks
Before opening the hatch covers, all cleats are to be （...
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
A （）is used for lifting long heavy cargo.A.derrickB.cra...
单项选择题A （）is used for lifting long heavy cargo.
A.derrick B.crane C.jumbo boom D.boom
