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播放：0 时间：2025-10-11简介： -
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![全231集2025新课提前学【北师大版六年级数学上册]北师大版六年级数学同步课堂+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%2Fi2.hdslb.com%2Fbfs%2Farchive%2F71615e66e56b537f89d3732dce3459cb660c6e7b.jpg%40672w_378h_1c_%21web-search-common-cover)
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