单项选择题
The COSPAS-SARSAT system can provide distress alerts to the appropriate rescue authorities（）.
A.at sea B.on land C.in the air D.throughout the world
单项选择题 For COAPAS-SARSAT system,（）process the distress signal from EPIRB to determine its position and identity.
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（）.
