问题
单项选择题
Land-based authority conducting and co-ordinating search and rescue operations in a designated area defines（）.
A.RCC
B.OSC
C.CSS
D.GPS
答案
参考答案：A
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Land-based authority conducting and co-ordinating search and rescue operations in a designated area defines（）.
A.RCC
B.OSC
C.CSS
D.GPS
参考答案：A