Chrome，
QQ浏览器
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播放：12 时间：2024-06-19简介： -
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![【获奖】苏教版初中九年级数学上册1.3 一元二次方程的根与系数的关系-周老师]【市一等奖】优质课优质课公开课教学视频](//imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2F073935556144be60823d224235ef9a404eee1eee.jpg%40672w_378h_1c_%21web-search-common-cover)
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