单项选择题
A.metacentric point B.metacenter C.metacentric radius D.tipping center
The magnitude of a moment is the product of the force a...
单项选择题The magnitude of a moment is the product of the force and（）.
A.time B.lever arm C.displacement D.angle of inclination
The center of buoyancy and the metacenter are in the li...
单项选择题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
The amount of freeboard which a ship possesses has a tr...
单项选择题The amount of freeboard which a ship possesses has a tremendous effect on its（）.
A.initial stability B.free surface C.stability at large angles of inclination D.permeability
