1.如图4复杂电路中电流I=( -3 )A.我想知道这是怎么得的-3?解题步骤、思路和公式都说下!2,.如图6中,a点的电位为( -8 )V.看不明白这图,怎么就得-8了?解题步骤、思路和公式都说下!3.如图8
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![1.如图4复杂电路中电流I=( -3 )A.我想知道这是怎么得的-3?解题步骤、思路和公式都说下!2,.如图6中,a点的电位为( -8 )V.看不明白这图,怎么就得-8了?解题步骤、思路和公式都说下!3.如图8](/uploads/image/z/2304379-19-9.jpg?t=1.%E5%A6%82%E5%9B%BE4%E5%A4%8D%E6%9D%82%E7%94%B5%E8%B7%AF%E4%B8%AD%E7%94%B5%E6%B5%81I%3D%EF%BC%88++-3++%EF%BC%89A.%E6%88%91%E6%83%B3%E7%9F%A5%E9%81%93%E8%BF%99%E6%98%AF%E6%80%8E%E4%B9%88%E5%BE%97%E7%9A%84-3%3F%E8%A7%A3%E9%A2%98%E6%AD%A5%E9%AA%A4%E3%80%81%E6%80%9D%E8%B7%AF%E5%92%8C%E5%85%AC%E5%BC%8F%E9%83%BD%E8%AF%B4%E4%B8%8B%212%2C.%E5%A6%82%E5%9B%BE6%E4%B8%AD%2Ca%E7%82%B9%E7%9A%84%E7%94%B5%E4%BD%8D%E4%B8%BA%EF%BC%88++-8+++%EF%BC%89V.%E7%9C%8B%E4%B8%8D%E6%98%8E%E7%99%BD%E8%BF%99%E5%9B%BE%2C%E6%80%8E%E4%B9%88%E5%B0%B1%E5%BE%97-8%E4%BA%86%3F%E8%A7%A3%E9%A2%98%E6%AD%A5%E9%AA%A4%E3%80%81%E6%80%9D%E8%B7%AF%E5%92%8C%E5%85%AC%E5%BC%8F%E9%83%BD%E8%AF%B4%E4%B8%8B%213.%E5%A6%82%E5%9B%BE8)
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