北5数下《长方体的认识》微课

https://v.qq.com/txp/iframe/player.html?vid=w0380pvlvju&width=500&height=375&auto=0

https://v.qq.com/txp/iframe/player.html?vid=v0146pl7sh6&width=500&height=375&auto=0

---

复制打开网址 www.1ydt.com 下载完整全册word教案试卷及PPT课件点击阅读原文看全部教学内容

https://v.qq.com/txp/iframe/player.html?vid=x0533zhg3pp&width=500&height=375&auto=0