阿摩線上測驗
21.The following signals are distress signals except:
(A)Flames on the vessel.
(B)Basket hanging in the rigging.
(C)A smoke signal giving off orange-coloured smoke.
(D)A rocket parachute flare.
答案：登入後查看
統計： A(36), B(142), C(61), D(13), E(0) #1411496
統計： A(36), B(142), C(61), D(13), E(0) #1411496
