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單項選擇題

The point to which your vessel’s center of gravity (G) may rise and still permit the vessel to have positive stability is called the（）.

A.metacentric point
B.metacenter
C.metacentric radius
D.tipping center

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單項選擇題

The magnitude of a moment is the product of the force and（）.

A.time
B.lever arm
C.displacement
D.angle of inclination

單項選擇題

The center of buoyancy and the metacenter are in the line of action of the buoyant force（）.

A.only when there is positive stability
B.only when there is negative stability
C.only when there is neutral stability
D.at all times

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