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
54
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/6KQO777K
0
考博英语
相关试题推荐
Hershrewdcampaignmanagerswereresponsibleforthefactthatherpoliticalsloganswereactuallyforgottenclichesrevivedan
SteveJobsisanentrepreneur.Andthatishowhistorywilllongrememberhim.Notprimarilyasafiduciaryoraninstitutionbu
Thebeliefthatthemindplaysanimportantroleinphysicalillnessgoesbacktotheearliestdaysofmedicine.Fromthetimeo
Goodleadersrecognizethatanorganization’sstrategiesforsuccessArequireBthecombiningCtalentsandeffortsofmanypeople
InJune2006,inMinato,Tokyo,a16-yearoldhighschoolstudentwaskilledbyaSchindlerelevator.Hewasbackingoutofitw
Formultinationalcorporations,taxplanninghasbecomeextremelycomplexaffairs.Ithasbeenstatedthatnomultinationalcorp
IfyouhappenedtobewatchingNBConthefirstSundaymorninginAugustlastsummer,youwouldhaveseensomethingcurious.The
IfyouhappenedtobewatchingNBConthefirstSundaymorninginAugustlastsummer,youwouldhaveseensomethingcurious.The
Whethertheextensionofconsciousnessisa"goodthing"forhumanbeingisaquestionthat______awidesolution.
ThereisonelastquestionImustdealwithinthischapter.Whyshouldhumanbeingsbemoral?Anotherwayofputtingtheproble
随机试题
行政诉讼被告负举证责任,但不排除对某些事项应当由原告提供证据。()
细菌的特殊结构不包括
下列哪一项为新药Ⅳ期临床试验的内容之一
患者,男,78岁。患背部有头疽月余,局部疮形平塌,根盘散漫,疮色紫滞,溃后脓水稀少,伴有唇燥口干,便艰溲短,舌质红,脉细数。内治应首选
女性,24岁。病程6年,说有人要害她,常自笑,好追求异性,有时打人摔东西,话多内容凌乱。精神检查:意识清晰,兴奋多语,思维松弛,欣快,主动接触异性,有被害妄想及非系统性妄想,活动增多而无目的性,躯体及神经系统检查未见异常。该患者诊断为
某建设项目需购置甲、乙两种生产设备,甲生产设备基期购置数量2台,单价3万元;报告期购置数量4台,单价2.5万元。生产设备基期购置数量3台,单价4万元;报告期购置数量2台,单价3.5万元。该建设项目设备价格指数为()。
以概念同化的学习方式获得概念主要发生在()阶段。
下列句子中,加下划线词语的意义解释有误的一项是()。
传播按目标受众面的大小与性质,可分为大众传播和分众传播。大众传播是指特定社会集团利用报纸、杂志、书籍、广播、电影、电视等大众媒介向社会大多数成员传送消息、知识的过程。分众传播则是对受众进行区分;向社会特定成员传送消息、知识的过程。根据上述定义,下列不属于
Roger:So,howisyournewroommate?Abby:【D1】______Roger:Whathappened?Abby:She’salwaysmakingloudnoisesatmidnightan
最新回复
(
0
)