问题
单项选择题
A tonnage tax is levied according to the（）.
A.deadweight cargo tonnage aboard
B.displacement tonnage of vessel
C.gross tonnage of vessel
D.net tonnage of vessel
答案
参考答案：D
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A tonnage tax is levied according to the（）.
A.deadweight cargo tonnage aboard
B.displacement tonnage of vessel
C.gross tonnage of vessel
D.net tonnage of vessel
参考答案：D