百度试题 结果1 题目 4. It's the mixture of gases(气体的混合物). It surrounds the earth. We breathe in it every day. We can't live without it. It's air. 相关知识点: 试题来源: 解析 答案见上 反馈 收藏
The air we breathe in is actually a m___ of different gases, such as oxygen, hydrogen and so on. 答案 答案:mixture.mixture表示"混合物",不定冠词a后接单数可数名词.故填mixture.我们吸入的空气实际上是不同气体的混合物,比如氧气,氢气等.相关推荐 1The air we breathe in is actually a m___ ...
The creation of the Davy lamp in 1815 was to spark our continual awareness regarding the impact of gas and chemical pollution.doi:HUMPHRY DAVYStephensBorg, KeithJournal of Perioperative Practice
It goes without saying that we need air to live and breathe. The air we breathe on the surface is a mixture of several gases including oxygen, nitrogen, argon, carbon dioxide, and other gases in trace amounts. We breathe easiest with 21% oxygen present in the air. When other gases cont...
The air we breathe contains gases like oxygen and nitrogen that are essential to our customers. Air Liquide Engineering & Construction’s world-leading expertise and experience means the operation of our air separation facilities is not only adaptable to the different needs of those customers, but ...
B Air is the mixture of gases that you breathe. You cannot see, smell or taste air but it is around you. Layers of air surround the earth, too, making up the earth's atmosphere. Oxygen is a gas found in the air. All animals,including humans, need it to stay alive.Nitrogen and ox...
Air pollution affects the air we breathe. It is made up of harmful gases, droplets, and particles. These make the air quality(质量) 1 . Many things can cause air pollution. Some air pollution is caused by burning fossil fuels(化石燃料). Oil is used to make gasoline for cars. Cars and...
Breathe easier: Avoid medical-grade gas runouts Read the Article Compressed gas cylinder specifications Download the Brochure Safety Data Sheets (SDS) for gases Search for SDS Focus more on patient care. We'll focus on your medical gases. Find out how we can help you with your gas suppl...
When we look at the Physical Nature of Matter around us, we find it in three forms. These are solid, liquid and gas. All human beings are outwardly solids. The water which we drink is a liquid, while the air we breathe in represents a gas. The three states of matter that we have ...
Pure food, pure water, and pure air are matters of interest to all of us. We can, to a large extent, control what we put into our mouths, but we can control the air we breathe, 500 cc about 15 times every minute, only by the use of elaborate artificial systems or by geographically...