单项选择题
The stability of a semisubmersible ship would be seriously reduced if flooding occurred in the（）.
A.submerged hulls
B.column void spaces
C.dry mud tanks
D.ballast tanks
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The moment of a force is a measure of the（）.
A.turning effect of the force about a point
B.instantaneous value of the force
C.stability characteristics of the vessel
D.center of gravity location -
单项选择题
The maximum angle at which the intact stability curves are valid for ship’s is the angle for（）.
A.the limit of positive stability
B.the limit of small-angle stability
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单项选择题
The important initial stability parameter，GM，is the（）.
A.metacentric height
B.height of the metacenter above the keel
C.height of the center of buoyancy above the keel
D.height of the center of gravity above the keel
