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 air? Air is not just one gas....
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. ...
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. ...
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...
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...
While a saline solution is simply salt (the solute) dissolved in water (the solvent), air contains many gases. The solutes in air include oxygen, carbon dioxide, and water vapor. The solvent in the air is nitrogen. Typically, the particle size of the solute in a homogeneous mixture is ...
Compressed air is a gas or mixture of gases that is pressurized to a degree greater than that of its surrounding environment. When used as a tool for the maintenance of computers (as well as other electronic devices) it is typically put into a container with a narrow output valve, which ...
→mixture n.混合物 7.mercy n.怜悯 → merciful adj.仁慈的 8.possess vt.拥有 → possessionn.财产 二、一词多义 1.merchant n.商人;批发商 adj.海上货运的 ①The merchants of Arab are doing their things all of the world.(...