问题
单项选择题
Under the rules, the term vessel includes（）.
A.non-self-propelled raft
B.seaplanes
C.hovercrafts
D.All of the above
答案
参考答案：D
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Under the rules, the term vessel includes（）.
A.non-self-propelled raft
B.seaplanes
C.hovercrafts
D.All of the above
参考答案：D