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
75
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、Reduce the amount of nitrogen.
B、Increase the release of oxygen.
C、Reduce nitrous oxide emissions.
D、Stop industrial activities.
答案
C
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3162955.html
相关试题推荐
Conversationcallsforawillingnesstoalternatetheroleofspeakerwith_____
ItreallygotMr.Brown’s______whenhehadtowaittwohourstogethisplane
Whenanumberofpeople______togetherinaconversationalknot,eachindividua
Whenhefirststartedinuniversity,hereallyfeltat______withhismajor—e
Americansensureproperrespectforthenationalflagby[br][originaltext]
Americansensureproperrespectforthenationalflagby[originaltext][14]L
WhereareJoan’sfamilyaregoingtospendsummer?[br][originaltext]W:Charle
WhereareJoan’sfamilyaregoingtospendsummer?[br][originaltext]W:Charle
WhereareJoan’sfamilyaregoingtospendsummer?[originaltext]W:Charles,Iw
Inthisconversation,whatisBetsy?[br][originaltext]M:Hey,Carla,haven’t
随机试题
ThereisagreatconcerninEuropeandNorthAmericaaboutdecliningstandard
CounselingTeamandtheServices1.Counselingteam-NaomiFlynna.Targeting:
[originaltext]W:Hello.CanItakeyourorder?M:Yes.I’dlikealargepeppero
Ifyouthink"A"isright,please______(black)itwithyour2Bpencilblacken
TheNationalTrustinBritain,togetherwithsimilarvoluntaryorganization
ChicagoPublicSchoolsofficialsaregivingthepublicanearlylookatthe
与组织日常的、例行的运营工作不同,项目具有些非常明显的特点。“没有完全一样的项目
下列事项中,属于专利权保护对象的是()。A:施工企业的名称或标志 B:施工企
下列关于资产负债表不正确的是( )。A.资产负债表反映企业一定日期全部资产、负
在管道发生大量泄漏时紧急止漏,一般还具有过流闭止及超温闭止的性能,并且能在近程和
最新回复
(
0
)