初三电功率两道题http://imgsrc.baidu.com/forum/pic/item/873ab027c8bf13598b82a142.jpghttp://imgsrc.baidu.com/forum/pic/item/bf583847b95cb3476a63e542.jpg
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![初三电功率两道题http://imgsrc.baidu.com/forum/pic/item/873ab027c8bf13598b82a142.jpghttp://imgsrc.baidu.com/forum/pic/item/bf583847b95cb3476a63e542.jpg](/uploads/image/z/11260127-47-7.jpg?t=%E5%88%9D%E4%B8%89%E7%94%B5%E5%8A%9F%E7%8E%87%E4%B8%A4%E9%81%93%E9%A2%98http%3A%2F%2Fimgsrc.baidu.com%2Fforum%2Fpic%2Fitem%2F873ab027c8bf13598b82a142.jpghttp%3A%2F%2Fimgsrc.baidu.com%2Fforum%2Fpic%2Fitem%2Fbf583847b95cb3476a63e542.jpg)
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