单选题DSC遇险确认呼叫序列的格式符与类别分别是()。A选呼/紧急B全呼/安全C全呼/遇险D群呼/遇险
单选题
DSC遇险确认呼叫序列的格式符与类别分别是()。
A
选呼/紧急
B
全呼/安全
C
全呼/遇险
D
群呼/遇险
参考解析
解析:
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