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
The dark smoke that comes out of Stacks or from a burning dump contains tiny bits of solid or liquid matter. The smoke also cont
The dark smoke that comes out of Stacks or from a burning dump contains tiny bits of solid or liquid matter. The smoke also cont
admin
2013-01-24
35
问题
The dark smoke that comes out of Stacks or from a burning dump contains tiny bits of solid or liquid matter. The smoke also contains many gases, most of which cannot be seen. Altogether, they make up the serious problems of air pollution. In so many places it keeps us from seeing the sun, irritates our eyes, causes us to cough, and makes us iii.
Air pollution can spread from city to city. It even spreads from one country to another. Some northern European countries have had "black snow" from pollutants that have traveled through the air from other countries and have fallen with the snow. So air pollution is really a’ global problem.
Air pollution can kill babies, older people ,and those who have respiratory(呼吸道的) diseases. In London, in 1952,four thousand people died in one week as a result of a serious air-pollution episode. In 1948, in the small town of Donora, Pennsylvania, twenty people died in a four-day period of bad air pollution.
At levels often found in cities, air pollution increases the risks of certain lung diseases, such as emphysema ,bronchitis, and asthma. Of course, smoking and other factors help to cause these illnesses, too, but these cases have increased greatly during recent years as air pollution has become worse. Air pollution can cause both airplane and auto accidents because it cuts down visibility. There are other possible health dangers from air pollution that we don’t know much about. For example, scientists are trying to find out whether chemicals that reach us from the air may cause changes in our cells.
These changes might cause babies to be born with serious birth defects. Scientists are trying to learn how all the many chemicals we are apt to take into our bodies from air, water, food, and even medicines act together to affect our health and the way our bodies work. That is another reason why it is so important to begin to control pollution now instead of waiting until we learn all the answers.
Air pollution costs us a lot of money. It soils and corrodes our buildings. It damages farm crops and forests. It has a destructive effect on our works of art. The cost of all this damage to our government is astronomical. It would be much more worthwhile, both for us and for the environment, to spend our tax dollars on air pollution control.
Air pollution causes airplane accidents because ______.
选项
A、pilots become ill
B、visibility is reduced
C、engines fail.
D、the air is too hot
答案
B
解析
根据第三段中的第三句cut down visibility可以推知答案为B。
转载请注明原文地址:https://kaotiyun.com/show/9qaO777K
0
专业英语八级
相关试题推荐
IftheFederationofAmericanScientistsmadealistofeducationalvideogames,youmightexpecttofindOregonTrai,theStory
Thegreatestnovelistoftherealisminthe19thcenturywas______.
DavidLandes,authorofTheWealthandPovertyofNations:WhySomeAreSoRichandSomeSoPoor,creditstheworld’seconomica
EducationalValuesLifeisratherhecticforstudentsduringthefirstweekatNorthAmericanuniversities.However,students
TheImportanceofQuestionsFornon-nativespeakersofEnglishwhowanttoparticipateingroupdiscussions,itisimportant
Thisspring,disasterloomedintheglobalfoodmarket.Precipitousincreasesinthepricesofstapleslikerice(upmorethana
FourreasonsthatrosyNovemberjobsreportwasevenbetterthanitseemed.It’simportantnottomaketoomuchoutofasingle
"What’sdonecannotbeundone,"moanedLadyMacbethinherfamoussleepwalkingscene.Ifshewokeupinthe21stcentury,shewo
In2009,Pfizerpaid$301millionsettleallegationsbytheJustice1.______DepartmentthatcompanyrepresentativesmarketedGe
TheEnglishRenaissanceTheEnglishRenaissancedatesfromthelate15thandearly16thcenturiestotheearly17thcentury.The
随机试题
根据《物权法》的有关规定,下列关于住宅建设用地使用权期间届满后续期问题的表述中,正确的是()。
简单商品经济中决定商品生产者命运的是()
甲亢病人具有特征性的表现是
不属于颈椎病的临床表现的是
癫病心脾两虚证的治疗宜用养心汤送服
陈列和储存药品的养护工作包括()
注意力缺陷多动症最主要的病因为
工程项目施工过程中,常见的索赔证据不包括()。
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。
根据套利定价理论,下列买入一个套利组合的方式正确的是()。
最新回复
(
0
)