問題詳情

20.One of the most important distress signals is a signal sent by radiotelephone consisting of thespoken word“ ”.
(A)Security
(B)Attention
(C)MAYDAY
(D)PAN PAN

參考答案

答案：C
難度：非常簡單0.930233
統計：A(1),B(1),C(40),D(1),E(0)