单项选择题
A.operation B.operate C.operated D.operator
During the voyage, the derrick should be stowed （）.A. f...
单项选择题During the voyage, the derrick should be stowed （）.
A. fore B. aft C. fore and aft D. lowered
（）are usually stowed both above and below deck.A.Contai...
单项选择题（）are usually stowed both above and below deck.
A.Containers B.Trucks C.Machinery D.Clamps
There is no power for the （）.A. derrickB. winchC. block...
单项选择题There is no power for the （）.
A. derrick B. winch C. block D. heavy derrick
