知友们能解释一下小磁针在条形磁体内部n极指磁体s极的原因么,就具体一点。谢谢? 知乎 Template




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tomski知友们能解释一下小磁针在条形磁体内部n极指磁体s极的原因么,就具体一点。谢谢? 知乎 coloring