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. 结果一 题目 2.阅读理解。What is
分析句子可知,What the plants pump through the air(植物在空气中所释放出的东西)是主语从句,a mixture of chemicals(一种化学混合物)是表语,known as volatile organic compounds(称为挥发性有机化合物),VOCs for short(简称VOCs)是volatile organic compounds的同位语。故翻译为:植物在空气中所释放出的是一种被...
the element 'oxygen' is part of the mixture 'air' and some of the properties of air are due to the oxygen part - but those properties are generally less strong / intense than those of pure oxygen because of the presence of the other constituents of the mixture called 'air', e.g. ...
What is a mixture?lthough the air we breathe seems like a single(or pure) substance, it is actually aixture of many substances.Air consists of nitrogen(oxygen)carbon dioxide and other gases.Like air,all of the natural and manufactured materials on Earth can be put into one of two categori...
Whether a mixture is homogeneous or heterogeneous... well... this relates to the notion of “phase”. Remember we defined the word “phase” as being one physical state, whether solid, liquid or gas, that... well... that has distinct boundaries and uniform properties. ...
What the plants pump through the air is a mixture of chemicals (know)as volatile organic compounds, VOCs for short. (所给词的适当形式填空) 相关知识点: 试题来源: 解析 known 【详解】 考查分词化的形容词短语作定语。句意:植物通过空气输送的是一种被称为挥发性有机化合物的化学混合物,简称VOCs...
【难句理解】What the plants pump through the air is a mixture of chemicals known as volatile organic compounds, VOCs for short.结构分析,这是一个主从复合句。 What the plarts pump through the aitr 是Whar引导的主语从句;known as.是过去分词短语作后置定语。__汉语大意;植物释放到空气里的是一种被...
Class 12 CHEMISTRY What is a racemic mixture ? ...What is a racemic mixture ? Solution in Punjabi Video Solution Struggling with Haloalkanes And... ? Get free crash course Text SolutionVerified by Experts An equimolar mixture of the enantiomers (d extro and leavo forms) is called racemic...
This oil lubricates the rotors, seals gaps and helps cool the compressed air. Discharge: The compressed air, mixed with oil, exits the compression chamber. Oil Separation and Cooling: After compression, the air-oil mixture enters a separator tank to remove the oil from the air. Rotary scr...
create high concentrations of ozone in the air. Particulate matter is any mixture of tiny particles of acids, chemicals, metals, dust, and soil. There are two types of particulate matter: inhalable coarse particles, and fine particles. Inhalable course particles can come from dusty industrial plan...