阿摩線上測驗
4. What is the situation on board a ship when three calls of pan-pan in radiotelephone communications are used？
(A) a distress
(B) a securite
(C) an SOS
(D) an urgency
答案：登入後查看
統計： A(1), B(3), C(3), D(31), E(0) #4022370
統計： A(1), B(3), C(3), D(31), E(0) #4022370
