The average person can hold their breath for around two minutes. There are people who can hold their breath for over 15 minutes with special training. What is in the air that we need to survive? The answer is of course oxygen. We need to breathe oxygen to survive, without it we will ...
Air is a mixture of different gases. What is the main component of air? A. Oxygen. B. Nitrogen. C. Carbon dioxide. D. Hydrogen. 相关知识点: 试题来源: 解析 B。解析:空气的主要成分是氮气。选项 A 氧气不是主要成分;选项 C 二氧化碳含量很少;选项 D 氢气不是空气的主要成分。
Plants release oxygen into the air. This is important for what? A. Keeping the air clean B. Making the air dirty C. Stopping animals from breathing D. Harming the E. nvironment 相关知识点: 试题来源: 解析 A。解析:植物释放氧气到空气中,这对于保持空气清洁很重要。选项 B 使空气变脏错误,...
Step-by-Step Solution:1. Determine the Percentage of Oxygen in Air: - The composition of air is made up of various gases. The most significant component is nitrogen, which makes up about 78% of the atmospher
KéréisacitizenofbothBurkinaFasoandGermanyandlivesinBerlin.OnTuesdayhesaidhe wasthe“happiestmanonthisplanet”tobecomethe51strecipientofthefamousyearlyprize.Kéré isfamedforbuildingschools,healthcenters,housing,andotherpublicspacesacrossAfrica.His buildingscanbefoundinhishomeland,aswellasinBenin,Mali,Kenya,Mozambi...
It would have been so amazing to see the world as it was when the oxygen levels were even higher. The giant insects in particular must have been incredible. I mean, it wouldn't have been ideal for human life, but I'd love to see it as a tourist. Someone needs to hurry up and ma...
Air is not just one gas. It is a mixture of different gases. Because we can't see the gases in the air, it is difficult to think about them.There are four main gases in the air: oxygen (气), nitrogen (), carbon dioxide (.化碳)and argon().If 1,000 dots can represent the ...
百度试题 结果1 题目What makes up about 78% of air? A. Oxygen B. Nitrogen C. Carbon dioxide D. Argon 相关知识点: 试题来源: 解析 B。中文解析:文章中明确提到“Nitrogen makes up about 78% of air.”,氮气占空气的大约 78%。反馈 收藏 ...
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