单项选择题
The center of volume of the immersed portion of the hull is called the（）.
A.center of buoyancy B.center of flotation C.center of gravity D.tipping center
单项选择题 The center of the underwater volume of a floating vessel is the（）.
单项选择题 The center of flotation of a vessel is（）.
单项选择题 The center of buoyancy is located at the（）.
