Окружная конференция работников образования Северо-Восточного управления министерства образования
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![[Ru] Презентация проекта “Квадратура круга“ |](https://sun9-21.userapi.com/oq4-0lgRMyj6L7LEtaCo67TL93bCdeGxg2I1og/NawsstA03SU.jpg)
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