室分分布系统常见的问题有()
A.导频污染
B.阻塞基站
C.CDMA800对干扰GSM900
D.上下行不平衡
E.室内信号泄露
参考答案:A, B, C, D, E
____ can you do? [ ]
A. Who
B. What
C. Where
---When shall we restart our business?
--- Not until we our plan.
A.will finish
B.are finishing
C.are to finish
D.have finished