单项选择题
The safe working load of the derrick is ().
A.5 tons
B.5 metres
C.5 feet
D.5 mile
点击查看答案&解析
相关考题
-
单项选择题
Close the (), please.
A. hatch coamings
B. hatch covers
C. hatch beams
D. hatch openings -
单项选择题
()is cargo handling gear.
A.Derrick
B.Crane
C.A+B
D.Anchor -
单项选择题
Our ship is ()with automatic hatch covers.
A.equipped
B.equip
C.equipping
D.to equip
