The （）of the derrick is out of order.

单项选择题Renew a cargo runner, please. （）

A.fall
B.stay
C.guy
D.sling

单项选择题We use TEU as the unit of the standard containers. Its length is（）.

A.40ft
B.20ft
C.20m
D.40m

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

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