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1 janv. 2011 - ГОСТ Р 53620-2009 Информационно-коммуникационные технологии в образовании. Электронные образовательные ресурсы. Общие положения;

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koshelevMY

21 nov. 2019

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1 janv. 2011

Maintenaint

~ Il y a 14 ans

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