А9 РТ 20-21 этап 2. Оксиды. Тесты по химии
Задание А9 из 2 этапа РТ 2020/2021 по химии на темы: оксиды, простые вещества, реакции с кислородом
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![Rothmans Rally New Zealand 1992 | Group A [Passats de canto] (Telesport)](https://sun9-39.userapi.com/YXChDTE1rudA3Dvb0rDSMfOmznCK90NJX78pwQ/OD1Wp3FVgmM.jpg)
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