15.若航向角為S100°W,則真航向為何?
(A)080°
(B)100°
(C)260°
(D)280°
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統計: A(5), B(2), C(12), D(47), E(0) #1194499
統計: A(5), B(2), C(12), D(47), E(0) #1194499