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單項(xiàng)選擇題

Bilge keels are more effective at dampening rolls as the（）.

A.pitching increases
B.list increases
C.rolling increases
D.draft decreases

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單項(xiàng)選擇題

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

單項(xiàng)選擇題

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

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

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