如图所示为ab两点电荷所形成电场的电场线分布图.cd两点之间的虚线为ab连线的垂线以下几种说法中正确的是 A.ab为异种电荷 Template




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tomski如图所示为ab两点电荷所形成电场的电场线分布图.cd两点之间的虚线为ab连线的垂线以下几种说法中正确的是 a.ab为异种电荷 coloring