单项选择题
The document on a vessel，annually endorsed by an American Bureau of Shipping surveyor，is called the（）.
A.Certificate of Inspection B.Classification Certificate C.Load Line Certificate D.Seaworthy Certificate
单项选择题 The conclusion is（）the said ship is fit to continue to sail.
单项选择题 The burden of proving unseaworthiness is upon those who（）it.
单项选择题 The bottom of the mast rests on a part of the keel called the mast（）.
