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20.咕咚 教学
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https://v.qq.com/txp/iframe/player.html?vid=c01819gj26n&width=500&height=375&auto=0
https://v.qq.com/txp/iframe/player.html?vid=w05321dgvz6&width=500&height=375&auto=0
复制打开网址 www.1ydt.com 下载全册PPT课件及word教案试卷点击阅读原文看全部教学内容
https://v.qq.com/txp/iframe/player.html?vid=c01819gj26n&width=500&height=375&auto=0