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數學學不好,現在看回機械書籍計算的部分,微分、積分的看著頭痛 |
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點評
說的好
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Archiver|手機版|小黑屋|機械社區 ( 京ICP備10217105號-1,京ICP證050210號,浙公網安備33038202004372號 )
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