Д.Н. Лебедев: Пионерии 90 лет
Дмитрий Николаевич ЛЕБЕДЕВ
Координатор Московского совета пионерских организаций
Кандидат педагогических наук
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![Что же такое энтропия? [Veritasium]](https://sun9-20.userapi.com/8Oe1dulWiZqtIbMEMni1A3FIFcYPjyuAFK6vdQ/kR4F-aB0YPs.jpg)
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![Почему правда больше никому не нужна? [Veritasium]](https://sun9-41.userapi.com/HUV_6LnoBsjAQnYhqrcHcj9UGJySKOTr_4pMig/2Zckc5BGGJI.jpg)
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