Мастер-класс Химия снега в экоцентре Яуза для учеников школы
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![[Образование. Обучение - Znaika TV. Знайка.ру] Химия 11 класс. Общая характеристика s p d f – элементов](https://sun9-9.userapi.com/impg/jT-9wC7Bez5dbltpTH9-crKqN4451VHFSaqthQ/4bYPF-Z2efg.jpg?size=320x240&quality=95&keep_aspect_ratio=1&background=000000&sign=5b9c4b3f26f8201198a0b9db07562e32&c_uniq_tag=SzT3jL6tGRfEGn1xA8GqsBwnQUlGUCnMJbXvVg45gCU&type=video_thumb)
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