首页
登录
职称英语
What is the main topic of the conversation? [br] [originaltext]M: I’m really sh
What is the main topic of the conversation? [br] [originaltext]M: I’m really sh
游客
2023-11-06
31
管理
问题
What is the main topic of the conversation? [br]
M: I’m really shocked at the air quality of the inland valley. Look at it.
W: Yes, over the last few decades there has been an enormous emphasis on development with hardly any concern for the environmental consequences.
M: I can certainly see the problems it has caused. I remember watching the stars at night as a child; it was so bright and beautiful. What do you think caused all of this?
W: It wasn’ t one single source like a power plant or some large industry. I’ m sure there were a number of contributing factors. I bet cars were one of the major causes of damage, though.
M: I remember now. Haven’ t I heard something about high levels of nitrous oxides emitted from cars?
W: Precisely. There are too many nitrous oxides coming out of cars. Anytime something is burned in the atmosphere at high temperature, it causes the nitrogen in the air to combine with oxygen--forming nitrous oxide radicals. Radicals are combinations of dements that behave as if they were a single element. Nitrous oxides also tend to be rather heavy.
M: Well, what’s wrong with that?
W: When heavy gasses are released, riley don’ t float away and mix with the atmosphere, they hover above the area in which they are produced causing the air to stagnate. Eventually other pollutants such as dust and soot are also mixed into the air, and a big brown cloud hangs over the city.
M: Oh, I see. Then as a result of all the trapped pm-tides, the air becomes ugly, and it is difficult to see very far.
W: Not only that, the nitrous oxides themselves are dangerous. Nitrous oxide radicals are highly active. They cause damage to concrete, and they are believed to create many health problems. Some people even say that certain forms of cancer may be developed from living in areas with high levels of nitrous oxides.
选项
A、Stagnant air.
B、Damage to concrete.
C、Unfounded fears.
D、Potential carcinogenic effects
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3162957.html
相关试题推荐
Whatisthenewsitemmainlyabout?[originaltext]It’sbacktoworkforIndi
WhodidNOTattendtheconferenceoneducationalgames?[br][originaltext]
WhodidNOTattendtheconferenceoneducationalgames?[originaltext]Fors
Whatpreventsthemanfromtakingthepoetsof1960’sclass?[br][originaltext
Whatpreventsthemanfromtakingthepoetsof1960’sclass?[originaltext]W:Hi
Whatisthepossiblerelationshipbetweenthetwospeakers?[originaltext]W:On
What’stheadvantageofapartnership?[br][originaltext]M:Barbara,whathave
What’stheadvantageofapartnership?[originaltext]M:Barbara,whathaveyoub
NigeriareturnedtotheCommonwealthafter______.[originaltext]Commonwealth
HowmanysupportersgatheredinBelgradeCitySquare?[br][originaltext]F
随机试题
[originaltext]M:Doesthismusicbotheryourstudying,Pam?W:ActuallyI’mnot
[originaltext]W:[5]AndnowhereisourguestHarrisonBlacktotellusaboutL
某内部审计师在对公司的福利计划的实施程度进行抽样测试时,不会影响可容忍的抽样风险
一男性患者,42岁,3天来右下后牙阵发性自发痛,冷热刺激引起痛或加剧痛,昨夜痛不
合同履行不包括( )。A.项目承揽方按要求完成测绘工作 B.测绘项目委托单位
共用题干 WhyPeopleUsePseudonyms(假名字)?You
期货交易所交易规则无须载明的事项是()。A.风险管理制度 B.财务会计.
为了规避市场利率上升的风险,应进行的操作是()。A.卖出套期保值 B.买
关于有效市场的论述正确的是()。A、在弱式有效市场中,当前价格反映了公开信息
下列危险化学品中,严禁其运输管道穿越公共区域的是()。A.光气 B.氨
最新回复
(
0
)