首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Air Pollution and Acid Rain The increasing variety and prevalence of pollution presents the world with many extremely daunting p
Air Pollution and Acid Rain The increasing variety and prevalence of pollution presents the world with many extremely daunting p
admin
2013-08-12
48
问题
Air Pollution and Acid Rain
The increasing variety and prevalence of pollution presents the world with many extremely
daunting
problems, air pollution in particular ranks among the most serious. In the following text, air pollution and acid rain caused by automobiles will be discussed. Certain solutions to the problem will be provided in the conclusion.
It is widely known that cars are the main cause of air pollution in cities, accounting for 60% to 90% of all air pollution. This will get worse as the number of cars increases in urban areas. How do cars cause air pollution? First we must examine how a car works. There’s a mixture of petrol in the car’s internal combustion engine which create the force for the automobile to move. Unfortunately, in this process there are some poisonous chemicals which remain; these poisonous chemicals mainly come out of the car through the
exhaust
. It’s not just what comes out of the car exhaust that is dangerous, the brake system also causes pollution. Brakes on cars release asbestos, it is a highly dangerous substance and it can kill humans. Also, the tires themselves give off small rubber particles which are not very healthy.
Acid rain caused by air pollution has strongly influenced people’s lives. It is almost impossible to describe the mathematical relationship between what goes up as pollutant emissions and what comes down as acid rain. However, we do know the primary source of acid rain is the pollution released by power plants. The pollutants combine with moisture in the atmosphere and then fall as an acid rain. Germans often call it royal water, because it can break down gold.
The royal water falls in the form of rain or snow on the German Black Forest and attacks the soil. Microorganisms within the soil perish and metals harmful to trees like aluminum leak into the ground. At the same time, the acid rain attacks the trees’ leaves and
dissolves
their waxy coating. The leaves then
shrivel
and die. About one in every ten trees in the Black Forest is a fir. 76% of all firs in the Black Forest are dying. 41 % of all spruce are diseased, 43% of all pine are diseased, 26% of beech trees and 16% of all other trees are dying. Environmental groups like Green Peace campaign around Europe trying to stop the causes of acid rain.
We need to find solutions to this problem. First, we should try and discourage the overuse of cars. We could do this by raising taxes on petrol or by making cars more expensive.
Second, we can encourage alternative methods of transportation. For example, in Shanghai recently, a subway has been built underground, which takes some of the pressure off the roads. Some people would rather use the underground than drive their cars. Next, we could develop and use cleaner fuels instead of petrol. For example, we might use natural gas in the future or we might experiment with battery powered cars.
Finally, the actual by-products of vehicle emissions must be managed.(A)
Scientists and engineers are now trying to use mechanical means for reducing the amount of chemicals that are emitted from cars’ exhaust pipes.(B)
Germany is now leading the way in attacking this part of the problem.(C)
In order to clean up motor vehicle emissions, all new cars in Germany must now meet new emission standards and be fitted with a device called a catalytic converter. (D)
This is a device that is fixed over the exhaust and controls the carbon monoxide and other dangerous chemicals that cars give off. Like Germany, the United States also introduced strict clean air-controls on motor vehicle emissions in the mid-70s as part of their efforts to reduce acid rain. It’s unlikely that any one of these solutions will work on its own. It will take a combination of all four of these solutions to help solve the air pollution problem.
The word
exhaust
in Paragraph 2 is closest in meaning to______.
选项
A、fatigue
B、outlet
C、waste gases
D、extension
答案
B
解析
本题为词汇题,主要考查考生根据上下文对单词exhaust的理解。该词的所在句是:“these poisonous chemicals mainly come out of the car through the exhaust.”从这个语境来看,exhaust应该是“排气口,排气装置”的意思,正确答案应为选项B(出口),而选项A(疲乏,疲劳)、C(废气)、D(延长,扩充)都不符合题意。
转载请注明原文地址:https://kaotiyun.com/show/W2fO777K
0
托福(TOEFL)
相关试题推荐
Completethelecturenotes.UseNOMORETHANTHREEWORDSforeachanswer.PurposeoftheminilectureToexperience【T32】______
Labelthealuminumcan.WriteNOMORETHANTHREEWORDSforeachanswer.
Whataretheparkingregulationsoncampus?
CircleTHREElettersA~E.WhichTHREEofthefollowingusesofdamwaterarementioned?(A)providingwaterforlivestock(B)wate
Tofindouthowmuchholidayscost,youshouldpressbutton
Thelibrariansaysthattrainingalwaysincludes
ChooseTWOlettersA-F.Accordingtothespeaker,whatareTWOadvantagesofreducingclasssizes?Amoreemploymentforteacher
ChooseTWOletters,A-E.WhatTWOthingsdoesthearticlesayaboutgoal-setting?AMeetingsshouldstartwithaclearstatemen
ChooseTWOletters,A-E.WhichTWOproblemsdoesSamidentifyconcerningthelecturers?APunctuality.BOrganisation.CAcce
Choosethecorrectanswer,A,BorC.MuseumworkplacementThemostpopulartaskwhilstonworkplacementisusually
随机试题
对于女性尿道的长度,哪项描述是正确的
当事人对卫生行政机关作出的医疗事故处理决定不服的。当事人对医疗事故鉴定结论虽有异议,但不申请重新鉴定,而以要求医疗单位赔偿经济损失为由对鉴定委员会所作的鉴定结论不服的,病员及其家属可在接到鉴定结论
运用SWOT分析法对房地产产品进行定位时,企业着重考虑优势因素和机会因素的对策是()。
( )是综合检验设备制造和设备安装质量的重要环节。
单位负责人对依法履行职责的会计人员实行打击报复,情节恶劣的,依法给予行政处分。()
马来西亚以()为国教。
虽然国际主流媒体炒作“中国崛起”由来已久,但去年岁末和今年初评析“中国崛起”的文章日趋增多,用____来形容并不为过。仅在元旦前后这三天,欧美亚报刊上就出现了一批醒目的大字标题。一个____的原因,在于国际社会都想对中国改革开放三十年来所发生的种种变化,从
中国作为负责任的发展中国家,高度重视环境保护和全球气候变化。中国政府将保护环境作为一项基本国策,签署了《联合国气候变化框架公约》,成立了国家气候变化对策协调机构,提交了《气候变化初始国家信息通报》,建立了《清洁发展机制项目管理办法》,制定了《中国应对气候变
Mr.Lispoke______sothatevenhisopponentswerewonoverbyhisarguments.
Accordingtothenewsitem,theAffordableCareActis______.
最新回复
(
0
)