_______ is a service provided to notify appropriate organizations regarding aircraft in need of search and rescue aid, and assist such organizations as required.
A.alerting service
B.information service
C.rescue service
D.assistance service
正确答案是A
_______ is a service provided to notify appropriate organizations regarding aircraft in need of search and rescue aid, and assist such organizations as required.
A.alerting service
B.information service
C.rescue service
D.assistance service
正确答案是A