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播放：1 时间：2024-06-21简介： -
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![[初中物理基础知识点]《初中物理启蒙动画2368集：机械效率计算公式》中考物理压轴题，小升初衔接趣味动画学物理，初二物理八年级功和功率上册，物理人教版下册](http://imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2F545e212117620b677009b46baa36126e9f3950d1.jpg%40672w_378h_1c_%21web-search-common-cover)
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