单项选择题
The original equilibrium position is stable when（）.
A.metacentric height is positive
B.metacentric radius is positive
C.KG exceeds maximum allowable limits
D.free surfaces are excessive
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A continual worsening of the list or trim indicates（）.
A.negative GM
B.progressive flooding
C.structural failure
D.an immediate need to ballast -
单项选择题
A floating vessel will behave as if all of its weight is acting downward through the（）.
A.center of gravity
B.center of buoyancy
C.center of flotation
D.metacenter -
单项选择题
A serious loss of reserve buoyancy resulting from flooding any compartment of a ship will always（）.
A.increase the trim
B.change the free surface effect
C.cause a serious list
D.decrease ship stability
