问题
单项选择题
Set of current is（）.
A.velocit in knot
B.irection from which it flows
C.estimated current
D.direction toward which it flows
答案
参考答案：D
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Set of current is（）.
A.velocit in knot
B.irection from which it flows
C.estimated current
D.direction toward which it flows
参考答案：D
