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
2012-10-23
45
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.
Which of the following is NOT the result of laboratory experiments?
选项
A、Low concentrations
B、Fall in lung function
C、Irritability of the lungs
D、Airway inflammation
答案
A
解析
根据文章第二段第二句话可知,即使浓度非常低,也会导致肺功能的降低,导致肺的过敏性增强,并引发导氮管发炎。从中可知,B、C、D三项都是“laboratory experiments”的结果之一。所以答案为A。
转载请注明原文地址:https://kaotiyun.com/show/RT9O777K
0
考博英语
相关试题推荐
Yetthedifferenceintoneandlanguagemuststrikeus,sosoonasitisphilosophythatspeaks:thatchangeshouldremindusth
ItisagreedthatallnationsshouldtakemeasuresagainstterrorismonthebasisoftheUNandotherinternationallaws.
AgreementmadebythePresidentwithothercountries______theapprovaloftheSenate.
IntheUnitedStates,36statescurrentlyallowcapitalpunishmentforseriouscrimessuchasmurder.Americanshavealwaysargu
Readthefollowingparagraphandthenwritearesponsepaperofabout250to300words.WriteitneatlyonANSWERSHEET(2).
TheEnglishlanguagecontainsa(n)______ofwordswhicharecomparativelyseldomusedinordinaryconversation.
Themealwasexcellent;thesour-peppersoupwasparticularly______.
ItisagreedthatallnationsshouldtakemeasuresagainstterrorismonthebasisoftheUN______andotherinternationallaws.
Thenumberofticketsavailablewillbe_______bythesizeofthestadium.
随机试题
营养性缺铁性贫血:
下列符合中度慢性肝炎的描述是
《企业安全生产应急管理九条规定》中规定,每年至少组织()次应急演练。
中央银行运用货币政策调控宏观经济生效是需要时间的,这段时间称为货币政策()。
(2017年)纳税人发生的下列行为中,应征收消费税的有()。
根据《治安管理处罚法》的规定,公安机关受理报案、控告、举报、投案后,认为不属于违反治安管理行为的,应当告知报案人、控告人、举报人、投案人,并说明理由。()
阅读下列说明和图,回答问题。【说明】某物品拍卖网站为参与者提供物品拍卖平台,组织拍卖过程,提供在线或线下交易服务。网站主要功能描述如下:(1)拍卖参与者分为个人参与者和团体参与者两种。不同的团体也可以组成新的团体参与拍卖活动。网站记录每个参与
关于办公信息处理的描述中,正确的是
有如下函数模板:templateTcast(Uu){returnu;)其功能是将U类型数据转换为T类型数据。已知i为int型变量,下列对模板函数cast的调用中正确的是()。
Everyoneknowsthattaxationisnecessaryinamodernstate:withoutit,it【C1】______notbepossibletopaythesoldiersandpol
最新回复
(
0
)