初三物理16.1电压 知识点精讲

https://v.qq.com/txp/iframe/player.html?vid=m03836ch6sz&width=500&height=375&auto=0https://v.qq.com/txp/iframe/player.html?vid=o1400a95cp1&width=500&height=375&auto=0

点此看名师直播答疑讲座https://v.qq.com/txp/iframe/player.html?vid=a14045lxuw3&width=500&height=375&auto=0

请复制 http://t.cn/Ryh8lNh 打开下载配套的课件，点此看名师直播课，或点击左下阅读原文查看全部教程