6.如图所示的电路当可变电阻r的阻值增大时下列说法正确的是 A.ab两点间的电压u增大 B.ab两点间的电压u减小 c.通过r的电流 Template




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tomski6.如图所示的电路当可变电阻r的阻值增大时下列说法正确的是 a.ab两点间的电压u增大 b.ab两点间的电压u减小 coloring