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关于公式r＝的物理意义下面说法中正确的是 A．导体的电阻与它两端的电压成正比和通过它的电流成反比b．导体中通过的电流越大则电阻越小 Template






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tomski关于公式r＝的物理意义下面说法中正确的是 a．导体的电阻与它两端的电压成正比和通过它的电流成反比b．导体中通过的电流越大则电阻越小 coloring
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