单项选择题

The KM for a vessel may be determined by which of the following?（）.

A.Adding the KB and the BM
B.Subtracting the KB from the BM
C.Subtracting the GM from the KB
D.Adding the GM and the KB

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单项选择题

The material used extensively as electrolytic protection around bronze propellers is（）.

A.brass
B.copper
C.lead
D.zinc

单项选择题

The most important principle of the cargo stowage is（）.

A.to avoid the rearrangement of the cargo loaded on board
B.to ensure the safety of the ship and cargo
C.to reject the damaged cargo during loading operation
D.to prevent the spontaneous combustion of coal and grain