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播放：10 时间：2024-06-21简介： -
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![北师大数学七下《2.2利用同位角判断两直线平行》[老师]【市一等奖】优质课](http://imgshow.1ydt.com/img?url=%2F%2Fi0.hdslb.com%2Fbfs%2Farchive%2F2a81fb386f06cc9f917d17bd54b90c1226924483.jpg%40672w_378h_1c_%21web-search-common-cover)
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