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 daunti
Air Pollution and Acid Rain The increasing variety and prevalence of pollution presents the world with many extremely daunti
admin
2013-04-25
78
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.
Look at the four squaresthat indicate where the following sentence could be added to the passage. Use of the converter requires people to switch to lead-free petrol. Where would the sentence best fit?
选项
A、Square A.
B、Square B.
C、Square C.
D、Square D.
答案
D
解析
本题为篇章插话题,考查考生将特定的一句话,根据它与顺序相连的四个句子之间的逻辑关系插入其中一个方框的能力。要答对此题,考生必须深入理解各句子间的词汇、语法、连接等逻辑关系。根据上下文可以判断出句子“Use of the converter requires people to switch to lead-free petrol”应放在方框D处,因为前一句说“all new cars in Germany must now meet new emission standards and be fitted with a device called a catalytic converter (德国所有的新车必须符合新的排放标准,并在汽车上安装催化式排气净化器)”,这一句中的“device”和“catalytic converter”与插入句的“Use of the converter...”具有密切的词汇逻辑关系,因此D为正确答案。
转载请注明原文地址:https://kaotiyun.com/show/LayO777K
0
托福(TOEFL)
相关试题推荐
Questions39-40AnswerthefollowingquestionsaboutOverseasStudentsResearchAwardsusingNOMORETHANTHREEWORDSforeachg
Inthemiddlepart,Klaraneedstousea______.What’sthelastthingKlaraneedstodobeforegivingtheprofessorherproje
Martaworkedpart-timeasa______.Jeffsaysthatformteachersandsubjectteachersknowmoreaboutstudents’______.
InwhichsectionshouldthestudentswritetheirUKaddress?Whichisthesectionforexamsthatapplicantshaven’ttakenyet?
Completethesummarybelow.UseNOMORETHANTHREEWORDSforeachanswer.PROJECTMANAGENTLastweek’sdefinitionofpro
Completetheformbelow.WriteNOMORETHANTWOWORDSORANUMBERforeachanswer.Healthclubcustomerrese
Completethenotesbelow.WriteNOMORETHANTWOWORDSforeachanswer.HowtoChooseFlooringMaterialsSourceBeforeusing,m
Completethetablebelow.WriteNOMORETHANTWOWORDSAND/ORANUMBERforeachanswer.Talkingaboutthehistoryofbikes
Memorisation本题有关《古兰经》对学习方法的影响。录音中的impacts是题目中influences“影响”的同义替换。注意句子首字母需大写。
A、She’safraidofgettinghurtB、Shewon’tbefreethisweekendC、She’drathergotoMountHopeD、Shepreferstogoskiingbyhe
随机试题
急性胰腺炎的发病原因在中国主要是
急性链球菌感染后肾小球肾炎时,与肾小球滤过率降低无关的是()
洞式渗沟填料顶面宜高于地下水位。洞式渗沟顶部必须设置( )。
关于《报检员证》的表述,正确的有( )。
中国公民王先生是境内某公司的员工,同时也是一位作家。2014年5月取得的收入如下:(1)将本人一部长篇小说手稿的著作权拍卖取得收入5万元,同时拍卖一幅名人书法作品取得收入35万元。经税务机关确认,所拍卖的书法作品原值及相关费用为20万元。
2002年2月,三部委联合出台的关于个人教育贷款的“四定三考核”政策,定的是()。
下面属于生产性采购的是()。
后羿
Amtrak—thelargestrailwaycompanyintheU.S.—wasexperiencingadownswinginridership.【C1】______majorconcernstoAmtrakand
Asmostparentsofsmallchildrenwillreluctantlyadmit,nothingcanoccupyachildquiteliketelevision.【C1】______,thescient
最新回复
(
0
)