问题
单项选择题
PAN-PAN repeated three times over the radiotelephone indicates which type of message will follow?（）.
A.Distress
B.Safety
C.All clear
D.Urgency
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
PAN-PAN repeated three times over the radiotelephone indicates which type of message will follow?（）.
A.Distress
B.Safety
C.All clear
D.Urgency
参考答案：D
