問題詳情

24. Three calls of pan-pan in radiotelephone communications is usedto signify that there is ______ on board a ship
(A) a distress
(B) a securite
(C) an SOS
(D) an urgency

參考答案

答案：D
難度：非常簡單0.923077
統計：A(1),B(0),C(1),D(24),E(0)