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
2012-04-23
23
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 ill.
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
根据第四段中的第三句cut down visibility可以推知答案为B。
转载请注明原文地址:https://kaotiyun.com/show/G3iO777K
0
专业英语八级
相关试题推荐
IntheUnitedStates,charterschoolsprovidealternativesto"regular"publicschools.Unlikemostpublicschools,chartersdon
IntheUnitedStates,charterschoolsprovidealternativesto"regular"publicschools.Unlikemostpublicschools,chartersdon
Afullmoonwasshiningdownonthejungle.AccompaniedonlybyanIndianguide,theAmericanexplorerandarchaeologistEdward
Whichofthefollowingcountry/countriesdraftedtheproposalforchangestoadraftUNresolutiononIraq?
ItisincongruousthatthenumberofBritishinstitutionsofferingMBAcoursesshouldhavegrownby254percentduringaperiod
Asimplifiedlanguagederivedfromtwoormorelanguagesiscalledapidgin.Itisacontactlanguagedevelopedandusedbypeop
Tilequestionofwhetherwarisinevitableisonewhichhasconcernedmanyoftheworld’sgreatwriters.Beforeconsideringthis
TheBibleitselfcontainsatotalof66booksandisdividedintotwoparts,theOldTestamentandtheNewTestament.TheOldTe
Thedarksmokethatcomesoutofstacksorfromaburningdumpcontainstinybitsofsolidorliquidmatter.Thesmokealsocont
当大痛苦来临时,就没有时间流泪了。当天地真正寒冷时,人们就彼此靠近了。对于死亡,对于悲剧,既然无法挽回、无法逃避,就只有面对,往好处想:“我在故我思”。每次看到地震后光秃秃的山头,我就想,那上面会由人们种出更蓊郁的森林。每次看到废墟的画面,
随机试题
行政机关对政府信息不能确定是否可以公开时,应当依照法律、法规和国家有关规定报有关主管部门或者上级保密工作部门确定。()
下列属于条件反射的是
(2015年)案情:鸿捷有限公司成立于2008年3月,从事生物医药研发。公司注册资本为5000万元,股东为甲、乙、丙、丁,持股比例分别为37%、30%、19%、14%;甲为董事长,乙为总经理。公司成立后,经营状况一直不错。2013年8月初,为进一步拓展市
A市甲企业欠乙企业货款200万元,由某城市银行A市支行提供担保。乙企业从丙处购得价值188万元的机床一台,和丙协商后,以自己对甲的债权充抵机床价款,并征得了A市支行的同意。乙和丙约定若发生纠纷,则以协议订立地B市法院为管辖法院。后甲在履行债务时和丙发生纠纷
桥梁钻孔灌注桩基础施工时,灌注桩护筒高度宜高出地面()m或水面()m。
金属止水带接头应按其厚度分别采用折叠咬接或搭接,搭接长度不得小于( )mm。
在Excel中,删除工作表中与图表链接的数据时,图表将()。
下列有关代位权的说法中,符合法律规定的是()。
设f(x)在[0,1]上连续,且满足求证:f(x)在(0,1)内至少存在两个零点.
Thewaypeopleholdtothebeliefthatafun-filled,painfreelifeequalshappinessactuallyreducestheirchancesofeverattai
最新回复
(
0
)