单项选择题
A.fall B.stay C.guy D.sling
We use TEU as the unit of the standard containers. Its ...
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
The safe working load of the derrick is （）.A.5 tonsB.5 ...
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
Close the （）, please.A. hatch coamingsB. hatch coversC....
单项选择题Close the （）, please.
A. hatch coamings B. hatch covers C. hatch beams D. hatch openings
