单项选择题
A.1.5m B.1.8m C.2.5m D.1.0m
A.0.90mm,0.75mm B.0.80mm,0.70mm C.0.85mm,0.75mm D.0.90mm,0.70mm
A.0.111MΩ/km B.0.112MΩ/km C.0.113MΩ/km D.0.114MΩ/km
A.4.23Ω/km B.4.24Ω/km C.4.25Ω/km D.4.26Ω/km
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