一、 写出画线词语的汉语意思。1. Air is a mixture, not a compound of gases.2. I need to buy a new computer monitor.3. The monument was built in memory of George Washington, the first President of the United States. 相关知识点: 试题来源: 解析 1.混合物 2.显示器 3.纪念碑 二、...
根据“Air is a mixture of gases that you breathe.”(空气是你呼吸的气体的混合物。)可知 “Air is a mixture of gases”(空气是气体的混合物)正确。 根据“You cannot see, smell or taste air but it is around you.”(你看不见、闻不到也尝不到空气,但它就在你周围。)可知 “You cannot see t...
解答答案:mixture 根据a___of gases,可知应该用名词形式.mix,动词,混合.名词形式,mixture,混合物.a+可数名词单数,故填:mixture. 点评本题主要考查可数名词单数,名词形式,mixture,混合物.a+可数名词单数,要注意名词形式. 练习册系列答案 快乐练练吧云南科技出版社系列答案 学...
Air is a homogeneous mixture of gases which also contains argon and nitrogen which are used for filling electric bulbs. But air is not filled in electric bulbs because View Solution Doubtnut is No.1 Study App and Learning App with Instant Video Solutions for NCERT Class 6, Class 7, Class ...
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
Which statement best supports the fact that air is a mixture and not a compound? B A Air contains different elements. B Air can be separated by physical methods.C The composition in air remains constant throughout the world.The water vapour is a chemical compound.D 相关知识点: 试题来源...
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....
1. a mixture of gases (especially oxygen) required for breathing; the stuff that the wind consists of; "airpollution" "a smell of chemicals in theair" "open a window and let in someair" "I need some freshair" 2. travel via aircraft; ...
<p><strong>Step-by-Step Solution:</strong></p><p>1. <strong>Definition of Air</strong>: Air is the invisible mixture of gases that surrounds the Earth. It is primarily composed of nitrogen (about 78%), oxygen (about 21%), and small amounts of other gases
It was shown experimentally for the first time that, when an axisymmetric nozzle of special shape is placed in a tube, the shocktodetonation transition in a stoichiometric natural gas-air mixture occurs under normal conditions at a shock wave (SW) velocity at the nozzle inlet exceeding 1150 ±...