单选题CATEGORY A EPIRB’s transmit on frequencies that are monitored by（）.Aorbiting satellites in spaceBcommercial radio stationsCprivate，commercial，and military aircraftDordinary radio stations
单选题
CATEGORY A EPIRB’s transmit on frequencies that are monitored by（）.
A
orbiting satellites in space
B
commercial radio stations
C
private，commercial，and military aircraft
D
ordinary radio stations
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