电路中，电压的参考方�不是随便标的吗，那为什么这个题目不同的标法会得到不同的答案？ 知乎 Sketch Coloring Page

电路中，电压的参考方�不是随便标的吗，那为什么这个题目不同的标法会得到不同的答案？ 知乎 Template

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tomski电路中，电压的参考方�不是随便标的吗，那为什么这个题目不同的标法会得到不同的答案？ 知乎 coloring

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