单项选择题
A partially full tank causes a virtual rise in the height of the（）.
A.metacenter B.center of buoyancy C.center of flotation D.center of gravity
单项选择题 A neutral equilibrium position for a vessel means that the metacenter is（）.
单项选择题 A load line of a ship is assigned by（）.
单项选择题 A floating vessel will behave as if all of its weight is acting downward through the（）.
