单项选择题
Deep-sea liners are（）.
A.ferries B.passenger liners C.cruise ships D.ocean going vessels
单项选择题 The document which shows a vessel’s nationality，ownership，and tonnage is the（）.
单项选择题 The Tonnage Certificate gives the（）of a ship which is classified into gross tonnage and net tonnage.
单项选择题 When and where（）your Registry Certificate issued?
