单项选择题

The downflooding angle for a ship is the maximum angle at which（）.

A.stability is positive
B.neutral equilibrium exists
C.the load line is not submerged
D.intact stability curves are valid

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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
单项选择题
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
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