下列说法中正确的是 A.导体的电阻是导体本身的一种性质它的大小决定于导体的材料长度横截面积以及温度b.欧姆定律公式中的u是电源电压 Template




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tomski下列说法中正确的是 a.导体的电阻是导体本身的一种性质它的大小决定于导体的材料长度横截面积以及温度b.欧姆定律公式中的u是电源电压 coloring