What is about 20% of the air?

学习 时间:2026-11-13 15:19:13 阅读:1320
What is about 20% of the air?快要答案不要翻译,谢谢 about one fifth of the air is oxygen about four fifths of the air is nitrogen. 两句话帮忙也翻译一下吧,谢谢

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饱满的手链

动人的小蜜蜂

2026-11-13 15:19:13

oxygen