单项选择题

When air is at its dew point it（）.

A.will contain no additional moisture
B.has the lowest relative humidity
C.cannot keep up its moisture
D.has a low absolute humidity

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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 vesel will become great
单项选择题
When liquid is free to move transversely in a tank, the effect is called（）.

A.Free communication
B.Free fensity
C.Free surface
D.Negative GM
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