http://cross-join.livejournal.com/ ([identity profile] cross-join.livejournal.com) wrote in [personal profile] alexey_donskoy 2015-07-12 03:16 pm (UTC)

Зачем? Записки по элементарной физике легко проверить.
Чтобы вести кружок, разумеется, нужна квалификация.
(68 comments)

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