下面哪位社员是气象专家（）
A、潘菽
B、涂长望
C、梁希
D、俞平伯
参考答案：B
牡蛎丸1功效与作用
A radio link between a transmitting earth station and a receiving earth station through one satellite is named a（）.
A.Radio link
B.Space segment
C.Satellite link
D.upper link
