单选题COSPAS-SARSAT is intended to be used for（）.Adistress alertingBlocating 406mhz EPIRBsCstoring distress signalDA and B
单选题
COSPAS-SARSAT is intended to be used for（）.
A
distress alerting
B
locating 406mhz EPIRBs
C
storing distress signal
D
A and B
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