A.斷路器數(shù)大于回路數(shù); B.斷路器數(shù)等于回路數(shù); C.斷路器數(shù)小于回路數(shù); D.斷路器數(shù)小于等于回路數(shù); E.斷路器數(shù)大于等于回路數(shù)。