15. 某船航向S 30°E,航程180 浬, 則橫距(departure)為幾浬?
(A)90
(B)115.7
(C)121.4
(D)136.8
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統計: A(99), B(12), C(15), D(7), E(0) #3003048
統計: A(99), B(12), C(15), D(7), E(0) #3003048