Chrome，
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![全176集2025版新课提前学【北师大版五年级数学上册]北师大版五年级数学同步课堂+专项培优 暑假预习/复习精讲课堂(配套讲义习作 PDF)](//imgshow.1ydt.com/img?url=%2F%2Fi0.hdslb.com%2Fbfs%2Farchive%2Fbc03fba231d9516e9382d993e0b8521fed7bb5b4.jpg%40672w_378h_1c_%21web-search-common-cover)
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播放：5 时间：2024-06-20简介： -
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播放：3 时间：2025-09-22简介： -
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![全176集2025版新课提前学【北师大版五年级数学上册]北师大版五年级数学同步课堂+专项培优 暑假预习/复习精讲课堂(配套讲义习作 PDF)](http://imgshow.1ydt.com/img?url=%2F%2Fi0.hdslb.com%2Fbfs%2Farchive%2Fbc03fba231d9516e9382d993e0b8521fed7bb5b4.jpg%40672w_378h_1c_%21web-search-common-cover)
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