单项选择题

Before counterflooding to correct a list，you must be sure the list is due to（）.

A.negative GM
B.flooding
C.off-center weight
D.reserve buoyancy

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单项选择题

At an angle of loll，the righting arm (GZ) is（）.

A.maximum
B.negative
C.positive，but reflexive
D.zero

单项选择题

At an angle of loll，the capsizing moment is（）.

A.maximum
B.negative
C.positive
D.zero

单项选择题

At all angles of inclination，the metacenter is（）.

A.vertically above the center of buoyancy
B.vertically above the center of gravity
C.at the intersection of the upright vertical centerline and the line of action of the buoyant force
D.at the geometric center of the underwater volume