单项选择题
A.3kV,6kV,10kV,35kV,110kV,220kV,330kV,500kV B.3kV,6kV,10kV,35kV,154kV,300kV,500kV C.3kV,6kV,10kV,35kV,66kV,154kV,230kV,500kV D.3kV,6kV,10kV,35kV,115kV,230kV,300kV,500kV
A.15.5 B.21.3 C.13.2 D.40.3
A.10.57 B.10.1 C.10.72 D.10.31