相关考题
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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
