首页
登录
职称英语
Ground-level ozone is an air pollutant that causes human health problems eve
Ground-level ozone is an air pollutant that causes human health problems eve
游客
2025-04-15
24
管理
问题
Ground-level ozone is an air pollutant that causes human health problems even at very low levels. It also damages crops and other vegetation. It is a key ingredient of urban smog. "Good ozone" occurs naturally in the stratosphere approximately 10 to 30 miles above the earth’s surface and forms a layer that protects life on earth from the sun’s harmful rays.
"Bad ozone" is formed in the earth’s lower atmosphere, near ground level, when pollutants emitted by cars, power plants, industrial boilers, refineries, chemical plants, and other sources react chemically in the present of sunlight. Ozone pollution is a concern during the summer months when the weather conditions needed to form ground-level ozone — lots of sun, hot temperatures — normally occur. The length of ozone season varies from one area of the United States to another. Southern and southwestern states may have an ozone season that lasts nearly the entire year.
Ozone can irritate lung airways and cause inflammation much like sunburn. Other symptoms include wheezing, coughing, pain when taking it deep breath, and breathing difficulties during exercise of outdoor activities. People with respiratory problems are most vulnerable, but even healthy people who are active outdoors can be affected when ozone levels are high. Repeated exposure to ozone pollution for several months may cause permanent lung damage. Anyone who spends time outdoors in the summer is at risk, particularly children and other people who are active outdoors. Even at very low levels, ground-level ozone triggers a variety of problems including aggravated asthma, reduced lung capacity, and increased susceptibility to respiratory illnesses like pneumonia and bronchitis.
Ozone damage can occur without any noticeable signs. People who love in areas where ozone levels are frequently high may find that their initial symptoms go away overt time — particularly when exposure to high ozone levels continues for several days. Ozone continues to cause lung damage even when the symptoms have disappeared. [br] According to the passage, ground-level ozone causes the following health problem EXCEPT ______.
选项
A、stomach cancer
B、more serious asthma
C、decreased lung capacity
D、pneumonia and bronchitis
答案
A
解析
事实细节题。第三段最后一句话提到,甚至在地水准(基态)臭氧下也会引发健康问题,如严重的哮喘、肺功能衰竭、肺炎及支气管炎。只有选项A未提及。故答案为A。
转载请注明原文地址:http://tihaiku.com/zcyy/4038491.html
相关试题推荐
Ground-levelozoneisanairpollutantthatcauseshumanhealthproblemseve
Ground-levelozoneisanairpollutantthatcauseshumanhealthproblemseve
Ground-levelozoneisanairpollutantthatcauseshumanhealthproblemseve
Althoughthenuclearradiationproblemsremainunsolved,thegovernment’semphas
Howmanyreallysufferasaresultoflabormarketproblems?Thisisoneof
Howmanyreallysufferasaresultoflabormarketproblems?Thisisoneof
Howmanyreallysufferasaresultoflabormarketproblems?Thisisoneof
Veryfewscientists______completelynewanswerstotheworld’sproblems.A、comeu
Ahealthysystemofhighereducationoffersmanyrewards:scientificdiscove
Thebasiccausesareunknown,althoughcertainconditionsthatmayleadtocance
随机试题
Alandfreefromdestruction,pluswealth,naturalresources,andlaborsupp
Iwastryingtogetintothe______buswhenIheardavoicefrombehind.A、crowdB
Completethenotesbelow.WriteONEWORDAND/ORANUMBERforeachanswer.Moving
[originaltext]Youareinvitedtoalargeparty.Loudmusicisplaying,and
新生儿破伤风的潜伏期为A.1~2天 B.4~8天 C.2周~1月 D.1~
患者,女性,28岁,第1胎,足月顺产,当胎儿娩出后,阴道出血约为500ml,血液
强调引导小组组员建立团结、互助与合作的关系体现了小组工作()的特点。A.小组组
医院、学校等以公益为目的的事业单位、社会团体提供保证的保证合同无效。( )
假设企业某种原材料的年需求量为4000吨,单价为10000元/吨,单次订货费用为
对乙型肝炎抗病毒治疗的理解,不正确的是A.是一个艰难而长期的过程 B.可以联合
最新回复
(
0
)