照样子，写句子。  

例：坛(花坛)    操场中央有个美丽的大花坛。  

该                                                                                                   

夏                                                                                                   

末                                                                                                   

CU/RU与中继线路设备，（）及（）共同组成完整的地空遥控通信系统。

A.VHF收发信机、内话系统

B.VHF收发信机、RCE

C.VHF收发信机、MUX