单项选择题

There should be at least two tiers of dunnage for the cargo loaded on tank top，the first tier laid（）.

A.to prevent crushing of cargo
B.to separate cargoes
C.to prevent small containers from hanging up on the upper edges
D.to offer the drainage

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单项选择题
When cargo is shifted from the main deck into the lower hold of a vessel，（）.

A.The metacenter will move downward
B.The GM will increase
C.The center of buoyancy will move upward
D.The list of the vessel will become great
单项选择题
A wet cargo refers to（）.

A.a cargo that will be damaged if it gets wet
B.bulk liquids
C.cargoes that will cause condensation
D.liquids in containers
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