电能质量35kV及以上正负偏差不超过（）。
A.+10%，-10%
B.+7%，-10%
C.+10%，-7%
D.+7%，-7%
参考答案：D
-What is John looking for?
-__________.[ ]
A. He has already found his mobile phone
B. He hasn't found his mobile phone yet
C. He has lost his mobile phone
D. He has just found his mobile phone
配置同心圆小区的“内外圆信号强度差异”时，最好实地测量内外圆电平值，内外圆采用不同天线时，要多选点测量。同心圆小区的“内外圆信号强度差异”与以下哪个因素无关。（）
A、内外圆接收电平门限差异；
B、内外圆所在的合路器插损差异；
C、不同天线导致的路径损耗差异；
D、不同的频率选择性导致的路径损耗差异；
E、内外圆功放功率差异；
