Посмотрите какие мы красивые и как умеем плавать!
Новосибирский зоопарк им. Р.А. Шило
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![Периодическое изменение свойств химических элементов в ПСХЭ |Таблица Менделеева [Урок 10]](https://sun9-1.userapi.com/fNv27d7GbcIRknpHtMsHZRjutAqBvQ0izzF8Xg/eFHdYFaW-fc.jpg)
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