单项选择题
For COAPAS-SARSAT system,（）process the distress signal from EPIRB to determine its position and identity.
A.COSPAS-SARSAT B.ground receiving stations C.spacecraft D.satellite SAR instrument
单项选择题 The COSPAS-SARSAT system can provide distress alerts to the appropriate authorities（）.
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 which function is the most important one of the GMDSS.（）
