我国移动通信系统基站天线技术条件要求基站天线驻波比()。
A.≦1.0
B.≦1.2
C.≦1.5
D.≦1.8
参考答案:C
--- I don't mind telling you what I know.
--- You ________. I'm not asking you for it.
A.mustn't
B.may not
C.can't
D.needn’t
直角的( )倍是360°,一周角是( )平角。