阿摩線上測驗
33. As finding man overboard, the officer on watch should sound _____________ on the whistle.
(A) three short blasts
(B) two short blasts and one long blast
(C) three long blasts
(D) two long blasts and one short blast
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統計： A(0), B(3), C(7), D(1), E(0) #4055661
統計： A(0), B(3), C(7), D(1), E(0) #4055661
