IT雑談

aec1d8a5 anonymous 2016-10-14 13:21: 外国語やるならduolingoいいよ
ユーザー同士で教えあいで便利
たまに例文がぶっとんでるし

数学
電卓どころかもうブラウザでやれるやつはやっちゃうな

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