167 37 лекция 8 класс
Линзы. Оптическая сила линзы
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![Slender Fortress - Demo Samedi [TF2 Freak | New Boss!]](https://sun9-54.userapi.com/F80PThHHtq9W4FZwKIIW-HZs0S5iUvqlaMhywA/ablg5WMV9DE.jpg)
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