1.为了使电炉消耗的电功率减小到原来的一半应 A.使通过电炉的电流强度减半b.使电炉两端的电压减半c.使电炉的电阻减半d.使电炉的电阻和 Template




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tomski1.为了使电炉消耗的电功率减小到原来的一半应 a.使通过电炉的电流强度减半b.使电炉两端的电压减半c.使电炉的电阻减半d.使电炉的电阻和 coloring