Because we can't see thegases in the air, it is difficult to think about them.2.阅读理解. What is air? 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...
由原文第一段的Air is not jsut one gas. It is a mixture of different gases可知正确答案.故答案为C. (4).【答案】 A 【解析】 由原文第三段的If 1000 dots can represent the air, then 776 of them are nitrogen, 210 are oxygen, 11 are argon可知正确答案.故答案为A.反馈...
Gases that make up outdoor air: this article provides a table of the components in outdoor air - a list of the various gases found in air by percentage. The table gives the percent of each gas found in typical outdoor air, includes citations of authorita
The air we breathe is a mixture of gases. What is air? A. A liquid B. A gas C. A solid D. A powder 相关知识点: 试题来源: 解析 B。我们呼吸的空气是气体的混合物。选项 A 液体错误;选项 C 固体错误;选项 D 粉末错误。反馈 收藏 ...
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。
What rare gases are in the atmosphere? Earth's Atmosphere: Earth's atmosphere surrounds the planet, gradually thinning the farther away from Earth's surface it gets. Commonly called air, there is more in the atmosphere than just oxygen. ...
百度试题 结果1 题目智慧职教: Do you know what ___ so much greenhouse gases in the air?相关知识点: 试题来源: 解析 has produced 反馈 收藏
Butthereareotherconsiderations.Forexample, solarfarmsaredense(密集),whilethelandbetweenwindturbinescanbeco-usedforagriculture. Tidalpowerisan environmentally-friendly energysource.Inadditiontobeingarenewable energy,itdoesnotgiveoffanyclimategasesand doesnottakeupalotofspace.However,there ? ? ? ? ? ? ? ?
Air pollution is the contamination of air in our atmosphere by harmful gases and particulate matter that is not naturally found in the air. Air pollution is caused by many different sources, including the burning of fossil fuels, vehicle exhaust and industrial processes. ...
The definition of a greenhouse gas is at the same time very simple and very complicated for the ordinary man (or woman !) : such a gaz is “just” a gas mixed in the atmosphere thatabsorbs the infrared radiation emitted by the earth’s surface. We are not accustomed to these gases bec...