下列说法中错误的是 A.电荷的定�移动形成电流 b.�属导体中的自由电子定�移动的方�与电流方�相反 c.导体中有大量自由电荷 d.绝缘体中 Template




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tomski下列说法中错误的是 a.电荷的定�移动形成电流 b.�属导体中的自由电子定�移动的方�与电流方�相反 coloring