31．用电流表和电压表测�属丝的电阻时按如图所示的电路进行测量利用该电路进行实验的主要操作过程是第一步先将r2的�动头调到最左端 Sketch Coloring Page

31．用电流表和电压表测�属丝的电阻时按如图所示的电路进行测量利用该电路进行实验的主要操作过程是第一步先将r2的�动头调到最左端 Template

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tomski31．用电流表和电压表测�属丝的电阻时按如图所示的电路进行测量利用该电路进行实验的主要操作过程是第一步先将r2的�动头调到最左端 coloring

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31．用电流表和电压表测�属丝的电阻时按如图所示的电路进行测量利用该电路进行实验的主要操作过程是 第一步先将R2的�动头调到最左端 sketch template

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34．李刚同学想用电流表电压表测量一段电阻丝R的电阻他已连接了部分电路如图甲所示 请你接着完成下列步骤 1用笔画线代替导线将电路 sketch template

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