随动电桥断路或高电阻出现，故障是汇电环、电刷、或放大器。
The follow bridge circuit has cut off or high resistanced. The trouble is convergence coil, brush or amplifier.
尽管直流单电桥的灵敏度高，我们能否进一步提高其灵敏度，得到更为准确的被测电阻阻值呢？
Can we go a further step to improve its sensitivity, and get a measured resistance value more accurately?
分析了三种测量高值电阻的方法：改进电桥法、电压法、比较法，并用这三种方法对同一高值电阻进行了测量。
Three methods on measuring high resistance improved electric bridge method, voltage method, and comparative method are introduced in the article.
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