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电学计算：开关控制的动态电路的计算
这类题型，通过开关开闭来改变电路的连结方式，在审题时，要注意电路的变化，捕捉条件
电路及欧姆定律计算229/262
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![九寨沟县气象台更新道路结冰黄色预警信号[III级/较重]](http://p26-sign.bdxiguaimg.com/tos-cn-p-0015/osDaesfrEN9onFcAMrzBALDmEXQAiIGg9vCyzt~tplv-pk90l89vgd-fglass:864:486:90.jpeg?appId=32&biz_tag=list_custom%2Fnone&channelId=0&customType=custom%2Fnone&from=101_middle_image&imageType=list&isImmersiveScene=0&is_stream=0&lk3s=9d3f5bff&logId=20241218170808BC9C4F545449A2F554ED&requestFrom=101&x-expires=1766048889&x-signature=w0QRRgsLEWdO2cEdxAzFwwfIxVo%3D)
