Chrome，
QQ浏览器
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![[初三数学同步课01]二次函数的定义、图像和性质](//imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2F1cd2d1dac62f69c82ca2f1febd2b7c3b5fb744d1.jpg%40672w_378h_1c_%21web-search-common-cover)
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播放：0 时间：2025-06-13简介： -
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![[初三数学同步课01]二次函数的定义、图像和性质](http://imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2F1cd2d1dac62f69c82ca2f1febd2b7c3b5fb744d1.jpg%40672w_378h_1c_%21web-search-common-cover)
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