单项选择题
The waterplane area is described as the intersection of the surface of the water in which a vessel floats and the（）.
A.baseline B.vertical reference plane C.hull D.horizontal reference plane
单项选择题 The volume of watertight spaces of a vessel above its waterline is the vessel’s（）.
单项选择题 The upward pressure of displaced water is called（）.
单项选择题 The total weight of cargo，fuel，water，stores，passengers and crew，and their effects，that a ship can carry，is the（）.
