单项选择题
A.International Cargo Gear Certificate
B.International Loadline Certificate
C.International Safety Construction Certificate
D.International Seaman Identification
单项选择题 To calculate the free surface correction，it is necessary to divide the free-surface moments by the（）.
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（）.
单项选择题 The volume of watertight spaces of a vessel above its waterline is the vessel’s（）.