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sunny362502
2026-07-20 加入
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84 条公开笔记 · 1 个组
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物理原来很有趣：李淼的30堂物理课
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物理原来很有趣：李淼的30堂物理课
84 条
的。电子带负电，原子核带正电。
《物理原来很有趣：李淼的30堂物理课》
29天前
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