单项选择题
A.center of gravity
B.amidships station
C.center of flotation
D.geometric center of the waterplane area
单项选择题 In practice，it is usual for the ship to be loaded（）to improve the vessel’s movement through the water.
单项选择题 If the cause of severe list or trim is off-center ballast，counterflooding into empty tanks will（）.
单项选择题 If the buoyant force on a ship’s hull is equal to the displacement tonnage，the ship will（）.