Chrome，
QQ浏览器
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![人教数学七下公开课 8.1章前引言及二元一次方程组[毛老师]【市一等奖】优质课 有PPT课件 教案 说课稿](//imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2F6f0c08798f97f6392f6c34fe3d4cb53b58a1d981.jpg%40672w_378h_1c_%21web-search-common-cover)
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![北师大数学八上《5.1 认识二元一次方程组》[朱老师]【市一等奖】优质课](//imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2Ff3fe6d32175d0a881cc3a85563b1f83661aa39e5.jpg%40672w_378h_1c_%21web-search-common-cover)
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播放：1 时间：2025-10-16简介： -
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![人教数学七下公开课 8.1章前引言及二元一次方程组[毛老师]【市一等奖】优质课 有PPT课件 教案 说课稿](http://imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2F6f0c08798f97f6392f6c34fe3d4cb53b58a1d981.jpg%40672w_378h_1c_%21web-search-common-cover)
![北师大数学八上《5.1 认识二元一次方程组》[朱老师]【市一等奖】优质课](http://imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2Ff3fe6d32175d0a881cc3a85563b1f83661aa39e5.jpg%40672w_378h_1c_%21web-search-common-cover)
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