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为什么越往上氧气越少

更新时间: 2020-09-19 00:00:00     

引力减小,单位体积内的气体量减少,导致空气稀薄,不仅氧气减少,其他气体也都减少。虽然氧气比重比较轻,但由于大气压力的作用,氧气无法上升,高度越高,气压越大,故氧气无法上升。因为海拔越高,气压越低,空气越稀薄,相应的氧气也越少。

关键词: 为什么 氧气

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