智海急流（一）_参考网

智海急流（一）

2023-06-19胡天成/编绘

小猕猴智力画刊 2023年2期

关键词：铁棒胡天急流

胡天成/编绘

實验室里，科学老师拿出两根长长的铁棒对同学们说：“这两根铁棒中有一根是磁铁，你们有办法只用这两根铁棒就鉴定出哪根是磁铁吗？”

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