问题
单项选择题
Distress alerts will be relayed on the（）when the RCC considers it necessary.
A.dedicated system
B.MSI broadcasts
C.518KHZ
D.channel 16
答案
参考答案：B
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Distress alerts will be relayed on the（）when the RCC considers it necessary.
A.dedicated system
B.MSI broadcasts
C.518KHZ
D.channel 16
参考答案：B