問題詳情

23. A sound signal of seven short blasts and one long blast given with the vessel’s sound systemis_____ .
(A) distress alarm
(B) abandon alarm
(C) fire drill alarm  
(D) general emergency alarm

參考答案

答案:D
難度:適中0.5
統計:A(0),B(0),C(0),D(0),E(0)

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