问题
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
答案
参考答案：D
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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
参考答案：D