5、A空气污染;B一种混合气体;C大气;D尾气;根据文章大意,主要讲述了空气及其污染,故选A。 结果一 题目 As we all know, air is very important to living things. But what is it on earth? The air we breathe is a natural resource. As a natural resource, it found in nature. We often say, ...
1.As a natural resource, air1(find) in nature. It2(be) in the atmosphere. In fact, the atmosphere3(consist) of air, and the Earth4(surround) by it. 2.Recent studies have provided additional evidence (证据) that5(inhale) smoke from other people's cigarettes,6(call) passive smoke, ...
Allocation of Airspace as a Scarce Natural ResourceAssessment, Safe Skies for Tomorrow: Aviation Safety in a Competitive Environment, OTA-SET It was developed by the US Environmental Protection Agency to permit comparison of localgovernment possess- ing zoning power, the airport's projected noise ...
Air must be considered as an important natural resource vital to animals and plants for their life processes and to industry and transportation for combustion purposes. The quality of the air, or the chemical composition of its minor constituents, varies as a result of emission of contaminants fro...
We all must take efforts to protect our environment to keep it safe as usual forever. 答案 (1)natural.考查形容词。 句意:环境是指所有的自然环境,如土地、空气、水、植物等。名词surroundings需要形容词来修饰,此空用形容词作定语。故填natural. (2)helps.考查时态。
This paper uses computer entropy calculation method to take the Yangtze River Economic Belt as the research object, combined with the theory of resource and environmental carrying capacity, sustainable development, and coupled systems, s... J He,P Wu,K Tu - 《Journal of Physics Conference》 被...
a树是一种重要的自然资源,它不仅有利于环境的改变而且影响着人的身体健康。树可以净化空气,它把废气转化成我们所需要的氧气。树还可以防止水土流失,防止沙漠扩大。可见,树对我们是多么的重要。每年的三月十二号是中国的植树节,让我们多种树来保护我们的地球。 The tree is one important natural resource, not only...
In explaining change, the study found: (1) perception of ambient air quality was not related to air pollution levels; (2) air pollution declines as a public concern as other socioeconomic problems surface; and, (3) the mass media has an important role in affecting public attitudes and ...
Although the US has made great strides in reducing emissions from coal-fired power plants, these plants still represent a major source of pollution and remain a major concern. Totally eliminating coal as a power source will be difficult with the higher power demands resulting from the transition ...
A. & Long, S. P. 30 years of free-air carbon dioxide enrichment (FACE): what have we learned about future crop productivity and its potential for adaptation? Glob. Change Biol. 27, 27–49 (2021). Article ADS CAS Google Scholar Flexas, J. et al. Decreased Rubisco activity during ...