19.When a wind blows round clockwise defines .
(A)veering(of wind)
(B)backing(of wind)
(C)standing(of wind)
(D)cycling(of wind)
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統計: A(3), B(5), C(4), D(4), E(0) #2401055
統計: A(3), B(5), C(4), D(4), E(0) #2401055