A （）(重吊杆)is used for lifting long heavy cargo.
第1题：
A.吊杆仰角有关，仰角越大张力越大
B.吊杆仰角有关，仰角越大张力越小
C.吊杆仰角无关
D.货重及吊杆自重有关
第2题：
The universal lifting spreader is a lifting device used on ______．
A.dockside container cranes
B.shipboard container cranes
C.straddle trucks
D.straddle cranes
第3题：
An automobile sling is used for ________
A.lifting aircraft and helicopters
B.lifting any kinds of cargo
C.lifting the heavy boxes
D.lifting cars and trucks
第4题：
The jumbo boom can lift heavy cargo, the gantry crane can hoist containers.（）
第5题：
heavy derrick（）
第6题：
What cargo does a jumbo boom or heavy derrick used for lifting?
第7题：
The preventer guy，as used on a conventional yard and stay rig，______．
A.Is rigged at an angle of 70° to 90° from the guy it assists
B.Takes the strain imposed on the schooner guy when burtoning cargo
C.Is rigged when lifting cargo that exceeds the SWL of a single whip
D.Should take the strain if the regular guy parts
第8题：
A.①②④⑤
B.①②③⑤
C.①～④
D.②～⑤
第9题：
jumbo boom（）
第10题：
吊件货
起重吊杆
重吊杆
重吊车