A.緊急任務(wù) B.戰(zhàn)略任務(wù) C.經(jīng)濟(jì)任務(wù)
A.繼電保護(hù)裝置動(dòng)作時(shí)間 B.斷路器跳閘時(shí)間 C.繼電保護(hù)裝置動(dòng)作時(shí)間與斷路器跳閘時(shí)間之和
A.電壓 B.電流 C.功率