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Вопрос по охране окружающей среды на каждый день (27.12)

2016-12-27View Original

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Вопрос с одним правильным ответом: Основная функция гравитационного фильтра заключается в . А. Удаление бактерий Б. Удаление мелких взвешенных частиц В. Удаление COD Г. Удаление BOD5 Выбор: Б

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