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小宝宝为什么总是对带开关的东西感兴趣？他们天生就是「开关控」吗？ - 知乎
source link: https://www.zhihu.com/question/325204223/answer/690127943
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因为，他们在探索「因果关系的机制」呢！当宝宝按开关时，会发生什么呢？按下开关 - 灯亮了按下开关 - 灯…
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