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小华同学做“用电流表、电压表测电阻”的实验，实验器材齐全且完好，电源电压保持不变．（1）小华正确串联实验器材，并将滑片放置于变阻器的一端，然后将电压表并联在电路中．闭合开关后，两电表的示数如图所示，...
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