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 the air:oxygen (氧气) ,nitrogen (氮气) ,carbon dioxide (二氧化碳) and argon (氩). If 1,000 dots...
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...
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 the air: oxygen (氧气) , nitrogen (氮气), carbon dioxide (二氧化碳)and argon(氩) .If 1,000...
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
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 authoritative sources, and discusses ...
By taking in some of the sun's heat, these gases have kept the earth's temperature at fourteen or fifteen degrees centigrade. But things are changing nowadays. With the development of modem industry, human beings are releasing more and more hot gases into the atmosphere, making the air ...
Air is a mixture of different gases. The chemical composition of air is different at different locations and altitudes in the atmosphere. However, It mostly contains gases such as oxygen, nitrogen, carbon dioxide, argon, methane, water vapor, sulfur oxides and some other gases....
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...
Gasmet designs and manufactures world-class gas analysis systems and emission monitoring solutions to measure gaseous emissions from industrial processes, gases released from natural sources into the atmosphere, and gases present in working environments.