单项选择题
A. hydraulic hatch cover B. hydraulic release unit C. hydraulic oil jack D. automatic hatch cover
Please help me lift the broken （）(垫舱料).A.materialB.plan...
单项选择题Please help me lift the broken （）(垫舱料).
A.material B.planks C.mats D.dunnage
I think you’d better use the （）(岸吊).A. derrickB. heavy ...
单项选择题I think you’d better use the （）(岸吊).
A. derrick B. heavy derrick C. shore crane D. floating crane
Please help me （）(解开) the guy.A.fastenB.unfastenC.moveD...
单项选择题Please help me （）(解开) the guy.
A.fasten B.unfasten C.move D.shift
