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In creasing free surfaces has the effect of raising the ______.
A.uncorrected KG
B.virtual height of the center of gravity
C.metacenter
D.metacentric height
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uncorrected KGB
virtual height of the center of gravityC
metacenterD
metacentric height
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单选题Free communication effect is in direct proportion to（）.A
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单选题Reducing free surfaces has the effect of lowering the（）.A
uncorrected KGB
virtual height of the center of gravityC
metacenterD
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