单项选择题
A.0.005 B.0.01 C.0.02 D.0.03
A.0.01 B.0.02 C.0.05 D.0.1
A.0.15 B.0.2 C.0.25 D.0.3
A.380V B.10kV~35kV C.66kV D.110kV
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