八上物理《密度与社会生活》名师精讲

https://v.qq.com/txp/iframe/player.html?vid=p0346q6dlfb&width=500&height=375&auto=0

https://v.qq.com/txp/iframe/player.html?vid=k0345joa42m&width=500&height=375&auto=0

初中名师在线辅导答疑(名师一节课，胜读N年书)https://v.qq.com/txp/iframe/player.html?vid=a0548bu2gk4&width=500&height=375&auto=0

复制 www.1ydt.com 打开下载配套的ppt课件及教案，点阅读原文看全部教学视频