单项选择题

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

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

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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

单项选择题
The most important principle in the stowage is().

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

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