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
Acid rain, which is a form of air pollution, currently becomes a subject of great debate because of widespread environmental dam
Acid rain, which is a form of air pollution, currently becomes a subject of great debate because of widespread environmental dam
admin
2013-11-21
101
问题
Acid rain, which is a form of air pollution, currently becomes a subject of great debate because of widespread environmental damage for which it has been blamed. It forms when oxides of sulfur(梳)and nitrogen(氮)combine with atmospheric moisture to yield sulfuric and nitric acids, which may then be carried long distances from their source before they drop in the form of rain. The pollution may also take the form of snow or fog or fall down in dry forms. In fact, although the term "acid rain" has been in use for more than a century — it is derived from atmospheric studies that were made in the region of Manchester, England — the more accurate scientific term would be "acid deposition". The dry form of such deposition is just as damaging to the environment as the liquid form.
The problem of acid rain originated with the Industrial Revolution, and it has been growing ever since. The severity of its effects has long been recognized in local settings, as exemplified by the spells of acid smog in heavily industrialized areas. The widespread destructiveness of acid rain, however, has become evident only in recent decades. One large area that has been studied extensively is northern Europe, where acid rain has eroded structures, injured crops and forests, and threatened life in freshwater lakes. In 1984, for example, environmental reports indicated that almost half of the trees in Germany’s Black Forest had been damaged by acid rain. The northeastern United States and eastern Canada have also been particularly affected by this form of pollution. Damage has also been detected in other areas of these countries and other regions of the world.
Industrial emissions have been blamed as the major cause of acid rain. Because the chemical reactions involved in the production of acid rain in the atmosphere are complex and as yet little understood, industries have tended to challenge such assessments and to stress the need for further studies and because of the cost of pollution reduction, governments have tended to support this attitude. Studies released by the USA government in the early 1980s, however, strongly indicated industries as the main source of acid rain, in the eastern USA and Canada.
The second paragraph is mainly about______.
选项
A、the origin of acid rain
B、the cause of acid rain
C、the formation of acid rain
D、the widespread damage of acid rain
答案
D
解析
主旨题。根据上下文推断,本段的中心句是该段第三句The widespread destructiveness of acid rain,however, has become evident only in recent decades,酸雨广泛的破坏力直到近十年才引起人们的注意。所以这里强调的是酸雨广泛的破坏力,而非酸雨的来历、酸雨的诱因或者酸雨的形成。故答案为D项。
转载请注明原文地址:https://kaotiyun.com/show/xtS7777K
0
大学英语四级
相关试题推荐
A、HethoughtArtwasuseless.B、Hewasofferedajobinabigaccountingfirm.C、HewantedtogotoLondontostudyArt.D、Hewa
______thisbigsumofmoneyandalltheresearchefforts,wearelikelytodeveloplaserweaponsforuseinspace.
Overthehistoryoftheearth,millionsofanimalandplantspecieshavedisappeared.Mostofthesespeciesdisappeared,orbeca
A、EditingSundaySport.B、WorkingforCapitalRadio.C、Managingprofessionalsoccerteams.D、Developingasportsmarketingcompa
A、Becauseheisasuperman.B、Becausehecatchestheupdraftofaairventneartheground.C、BecauseheisprotectedbyGod.D、
A、Itbecameapopulardrink.B、Ittastedbetterthanmixedwithbutter.C、TheyfollowedeverythingtheBritonsdid.D、Theywere
A、adogB、acatC、aratD、asnakeC细节题。对话中房东提出公寓里不许养大型动物。如dogs,cats,snakes;想租房子的人说他有只养在笼子里的老鼠,房东同意只要老鼠不跑出来就可以养了,所以正确答案是rat,其他的都是
A、Teachherinadvance.B、Advisethelearningway.C、Talkaboutthefinalexam.D、Proposelearningschedule.A题干询问女孩会请求学科老师如何做。对
TheAntarcticozone(臭氧)holeischangingweatherpatternsacrosstheSouthernHemisphere(半球),evenaffectingthetropics,scienti
TheAntarcticozone(臭氧)holeischangingweatherpatternsacrosstheSouthernHemisphere(半球),evenaffectingthetropics,scienti
随机试题
平顺性、操纵稳定性感觉评价,可以不检查悬挂系统。()
患儿,女,10岁。乳房发育提前,月经来潮提前,经量少,周期不稳定,平素潮热、盗汗,手足心热,心烦,便秘,舌红少苔,脉细数。该患儿的治法是
A.清肺化痰,止咳平喘B.清肺化痰,软坚散结C.清肺化痰,清肝明目D.清肺化痰,利气宽胸E.降气化痰,宣散风热前胡的功效是
以下各项属于商业银行从事的银行账户中的外币业务活动的是()。
中国书法艺术源远流长,从夏商周,经过春秋战国,到秦汉王朝,二千多年历史的发展带动了书法艺术的发展,这个时期内各种书法体相继出现,其中()的出现是汉字书写的一大进步,为以后各种书体流派奠定了基础。
信用风险转移(CRT)是指金融机构,一般是指商业银行通过使用各种金融工具把信用风险转移到其他银行或其他金融机构。信用风险转移市场的参与机构主要是各种金融机构,主要的市场参与者包括商业银行、各种机构投资者和证券公司。根据以上定义,下列不属于信用风险
国际关系的一个基本事实是,当守成超级大国与崛起世界强国两大巨人相遇,其关系注定是极其__________而又非常__________的,二者之间的战略困境有可能因国际权力转移而加剧。依次填入划横线部分最恰当的一项是()。
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性:
【S1】【S4】
Acommitteewassetupto______theplansputforwardbyCongresslastyear.
最新回复
(
0
)