接入网丢包率参考值,KPI指标集要求()。
A、≤0.05%
B、≤0.1%
C、≤0.2%
D、≤0.5%
参考答案:B
Of all the students, Peter is ________ to me. [ ]
A. close
B. closer
C. the closest
变压器容量在()kVA以上有功铜损系数为0.01。
A.100
B.315
C.1000
D.4000