A.P交=P直B.P交< P直C.P交>P直
A.固體電介質(zhì)被擊穿B.固體電介質(zhì)表面局部氣體放電C.沿著固體電介質(zhì)表面氣體介質(zhì)貫通性放電
A.5°CB.10°CC.15°CD.20°C