There are a lot of other gases in the air. Water vapor(水蒸气) and hydrogen(氢) are two examples, but there are only very, very small amounts of them. (1). What is the meaning of the underlined word "represent" in the third paragraph? A. 代表 B. 分解 C. 提取 D. 组成 ...
Air is a mixture of gases primarily nitrogen and oxygen essential for respiration, whereas the atmosphere is Earth's protective layer of gases, encompassing air, water vapor, and other components.
There are a lot of other gases in the air.空气中有四种主要的气体:氧气、氮气、二氧化碳和氩气,空气中有很多其他气体,D选项意为空气中只有六种气体,与原文不符,因此不正确。故选D。(5)B.文章标题题。根据第一段What is air?Air is not just one gas.It is a mixture of different gases.什么是空气...
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 can represent the air, then 776 of them are nitrogen, 210 are oxygen, 11 are argon.There are a lot of other gases in the air. Wat...
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
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They are in favor of more money ___8(spend)on research into solar,wind and wave energy devices,which could then replace 9 ___( exist) power stations . Some scientists,however believe that even if we stopped 10___(release) carbon dioxide and other gases into the atmosphere tomorrow,we...
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....
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.
英语语法问题We have learned that air is a mixture of gases,___oxygen,water,vapor and carbon dioxide are the most important for what they do.A.whoseB.in whichC.of whichD.where答案选的是C,想问下为什么不能选D,另外介词为什么