题目内容
(请给出正确答案)
[单选题]
接触网额定电压值为(),最低工作电压为(),最高工作电压为()
A.27.5kV,20kV,29kV
B.27.5kV,19kV,29kV
C.25kV,19kV,27.5kV
D.25kV,20kV,27.5kV
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A.27.5kV,20kV,29kV
B.27.5kV,19kV,29kV
C.25kV,19kV,27.5kV
D.25kV,20kV,27.5kV
A.20
B.15
C.19
D.19.5