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【毎日一題 第129題】2019年5月9日

2019-05-09View Original

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この投稿は、2019年5月9日 21:32に緑蓮花によって最終的に編集されました。【毎日一問 第129問】2019年5月9日、大気中の窒素の量は酸素よりも少ないです。 判断問題() 2日以内に解答してください。
Reply #22019-05-09
間違い、78%窒素、21%酸素

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