首页
登录
职称英语
There is no question that the old style of air pollution could kill people.
There is no question that the old style of air pollution could kill people.
游客
2025-04-27
36
管理
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. [br] 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://tihaiku.com/zcyy/4056101.html
相关试题推荐
Thepassagesuppliesinformationforansweringwhichofthefollowingquestions?
Butweneedtogofurther.Wemustasksomefundamentalquestionsaboutthefutu
Superstitionisadifficultquestion.Wecannotquitesaythatsuperstition
Superstitionisadifficultquestion.Wecannotquitesaythatsuperstition
Superstitionisadifficultquestion.Wecannotquitesaythatsuperstition
Superstitionisadifficultquestion.Wecannotquitesaythatsuperstition
Superstitionisadifficultquestion.Wecannotquitesaythatsuperstition
Superstitionisadifficultquestion.Wecannotquitesaythatsuperstition
Thereisaquestion,however,thatmustbeansweredbeforethissynthesisis
Thereisaquestion,however,thatmustbeansweredbeforethissynthesisis
随机试题
Whenyoungwomenwerefoundtomakeonly82percentofwhattheirmalepeers
[originaltext]ThefirsthomegrownChinesejetliner,themediumrangeARJ-21Adv
Usually,therearetworeasonstopursuescientificknowledge:forthesake
妊娠早期的黑格尔征(Hegar'ssign)是指A.双合诊时感到子宫半侧较另半侧
小李在甲银行研究部门工作,但他准备辞职,辞职后可能到乙银行类似部门工作,则下列做
治疗阿托品中毒时用A.东莨菪碱 B.山莨菪碱 C.后马托品 D.琥珀胆碱
下列指标中,与运输成本成正比例变化的有()。A.空车走行率 B.机车辅助走行
抑制酪氨酸激酶,属于靶向抗肿瘤药的是A.吉非替尼 B.顺铂 C.昂丹司琼
以下属于人员促销的特点的是()。A:直接沟通 B:高度可信性 C:具有培植效
工序分析的步骤中,第二步是进行试验核实,可采用的方法是( )。A.因果分析图法
最新回复
(
0
)