单项选择题
The beacon located on board aircraft is termed（）.
A.EPIRB B.PLB C.ELT D.MCC
单项选择题 （）is capable of finding any 406MHZ beacons no matter where they are.
单项选择题 The COSPAS-SARSAT 406MHZ system was adopted as an element of the GMDSS by IMO in（）.
单项选择题 COSPAS-SARSAT has the function of（）.
