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
There is no question that the old style of air pollution could kill people. In one week following the infamous "peasouper" fog i
There is no question that the old style of air pollution could kill people. In one week following the infamous "peasouper" fog i
admin
2015-01-09
83
问题
There is no question that the old style of air pollution could kill people. In one week following the infamous "peasouper" fog in December 1952, 4,700 people died in London. Most of these people were elderly and already had heart or lung diseases. A series of these killer fogs eventually led to the British Passing the Clean Air Act which restricted the burning of coal.
Fortunately the effect of smog on the lungs is not so dramatic. Scientists have now conducted a number of laboratory experiments in which volunteers are exposed to ozone inside a steel chamber for a few hours. Even at quite low concentrations there is a reversible fall in lung function, an increase in the irritability of the lungs and evidence of airway inflammation(发炎). Although irritable and inflamed lungs are particularly seen in people with asthma(哮喘)and other lung diseases, these effects of ozone also occur in healthy subjects. Similar changes are also seen after exposure to nitrogen dioxide, although there is some disagreement about the concentration at which they occur.
Other studies have found that people living in areas with high levels of pollution have more symptoms and worse hung function than those living in areas with clean air. Groups of children attending school camps show falls in lung function even at quite low concentrations of ozone. There is also a relationship between ozone levels and hospital admissions for asthma, both in North America and Australia. It is suspected that long-term exposure to smog may result in chronic bronchitis(支气管炎)and emphysema(肺气肿), but this has yet to be proven.
Recently an association has been found between the levels of particles in the air and death rates in North American cities. The reason for this association is not understood and as yet there is no evidence this occurs in Australia However, we do know that hazy days are associated with more asthma attacks in children.
Irritable and inflamed lungs are also seen in people with_____.
选项
A、asthma
B、lung diseases
C、good health
D、weak health
答案
C
解析
从原文第二段的“Although irritable and inflamed lungs are particularly seen in people with asthma(哮喘)and other lung diseases,these effects of ozone also occur in healthy subjects.”可知,健康的人也会患肺气肿。因此选项C正确。
转载请注明原文地址:https://www.kaotiyun.com/show/BKQO777K
0
考博英语
相关试题推荐
Inrecentyears,businessschools______themaster’sdegreeinbusinessadministrationenjoygreatpopularityamongthemanagemen
Wewere______bytheextenttowhichteacher’sdecisionsservedtheinterestsoftheschoolratherthanthoseofthestudents.
SteveJobsisanentrepreneur.Andthatishowhistorywilllongrememberhim.Notprimarilyasafiduciaryoraninstitutionbu
Iran’smoralitypoliceare______onthesaleofBarbiedollstoprotectthepublicfromwhattheyseeasperniciouswesterncultu
Inhis1976studyofslaveryintheUnitedStates,HerbertGutman,likeFogel,Engerman,andGenovese,hasrightlystressedthe
Noformofgovernmentintheworldis______;eachsystemreflectsthehistoryandpresentsneedsoftheregionandthenation.
IfyouhappenedtobewatchingNBConthefirstSundaymorninginAugustlastsummer,youwouldhaveseensomethingcurious.The
Terrorismhasbecomesowidespreadthatitisnowimpossibletodismissitastheactionofafewcrazypeople.Infact,terroris
Terrorismhasbecomesowidespreadthatitisnowimpossibletodismissitastheactionofafewcrazypeople.Infact,terroris
随机试题
导游语言的生动性体现在()。
某市(市政府及其部门位于B区)A区甲律师事务所为招揽更多的业务,实行按案件标的额为介绍案件的人提取一定的“案件介绍费”的措施,并且对几个较为重大的案件,都给予了介绍人一定数额的费用。由于其在某一案件上通过这一办法将乙律师事务所的案件争揽过去,乙律师事务所对
骨肿瘤的发病部位有一定的规律性,以下表述正确的是
下列各项中哪—项不符合戊型肝炎病毒的特性
"胀病亦不外水裹、气结、血瘀"之说出自
A.硝苯地平B.卡托普利C.普萘洛尔D.氯沙坦E.氢氯噻嗪
对未取得建设工程规划许可证或者违反建设工程规划许可证的规定进行建设的单位有关责任人员,可以由其所在单位或者上级主管机关给予()。
陡峭的收益率曲线预示长短期债券之间( )。
某企业,2006年度共计拥有土地65000平方米,其中免费租给邻近部队训练占地3000平方米、幼儿园占地1200平方米,企业内部绿化占地2000平方米。2004年度的上半年企业共有房产原值4000万元,7月1日起企业将原值200万元、占地面积40
Homesaleswillbeweakerthisyearthanearlierforecastandarelikelytofallbelowyear-ago______asbuyerswaitforpricest
最新回复
(
0
)