在VHF地空通信系统中，电台设置频偏的目的是防止（）。
A.同频干扰
B.镜像干扰
C.互调干扰
D.交调干扰
参考答案：A
短语填空:(每空一词，每题一分；共5分)
小题1: I am ______ _______ (喜爱，喜欢) pop music .
小题2: He has ____ ____ _____ ______(下定决心) to kick his bad habits.
小题3: We should ______ _____ _______ (利用) this opportunity to learn more about the U.S.A.
小题4: Whether we can go hiking tomorrow _____ _____ (依靠；取决于) the weather.
小题5: They ____ _____ (搭起，建造) their tent at dawn .
There _____ a lot of rain in the south in summer. [ ]
A. is
B. are
C. have
D. has
