单项选择题
The angle of loll is a stability term which applies to a floating ship with（）.
A.off-center loading
B.stiff characteristics
C.excessive pitch or roll
D.negative initial stability
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Stability is determined principally by the location of two points in a vessel: the center of buoyancy and the（）.
A.metacenter
B.geometric center of the waterplane area
C.center of gravity
D.center of flotation -
单项选择题
Stability is determined principally by the location of the center of gravity and the（）.
A.aft perpendicular
B.center of buoyancy
C.keel
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单项选择题
Stability is determined principally by the location of the point of application of two forces: the downward-acting gravity force and the（）.
A.upward-acting weight force
B.downward-acting weight force
C.upward-acting buoyant force
D.environmental force
