问题
单项选择题
()is a space system using one or more artificial earth satellites.
A.Satellite network
B.Satellite link
C.GMDSS
D.Satellite system
答案
参考答案:D
()is a space system using one or more artificial earth satellites.
A.Satellite network
B.Satellite link
C.GMDSS
D.Satellite system
参考答案:D