首页
登录
职称英语
What is the main topic of the conversation? [originaltext]M: I’m really shocked
What is the main topic of the conversation? [originaltext]M: I’m really shocked
游客
2024-09-28
31
管理
问题
What is the main topic of the conversation?
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、The development of the automobile.
B、Declining air quality.
C、The structure of nitrous oxides.
D、Air quality management.
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3777518.html
相关试题推荐
IfyouhavereallybeenstudyingEnglishforsolong,it’sabouttimeyou______
Thethreesuicidebombingsoccurredin______.[br][originaltext]Itgoesag
Thethreesuicidebombingsoccurredin______.[originaltext]Itgoesagainst
Whichofthefollowingistrueaboutthenewsitem?[originaltext]Theauthor
Wherecanpeopletakeadulteducationcourses?[br][originaltext]Millions
Wherecanpeopletakeadulteducationcourses?[br][originaltext]Millions
WhatiscommontoallthefilmsproducedinHollywood?[br][originaltext]
WhatiscommontoallthefilmsproducedinHollywood?[originaltext]Hollyw
Themanislookingfor______[br][originaltext]M:Excuseme,Iwonderifyouc
Whattopicarethemanandwomandiscussing?[br][originaltext]M:Ireallyapp
随机试题
Musiccomesinmanyforms;mostcountrieshavestyleoftheirown.【C1】_____
Richard,KingofEnglandfrom1189to1199,withallhischaracteristicvirt
位于县城的某林场(增值税一般纳税人)2019年4月销售自产原木取得销售收入800
建筑装饰涂料中,内墙涂料与地面涂料共同的要求有()。A:透气性良好 B:耐碱
基金销售是指( )活动。A.基金宣传推介 B.基金份额申购 C.基金份额赎
呈卵圆形,具三棱,表面灰黄色,内有三室,每室一粒种子,呈椭圆形,一端有种脐,另一
Thechangeinthatvillagewasmiraculou
产业园物业采用新的节能技术与措施包括()。A:利用变频器控制(水泵、风机)电动机
某日化用品企业采用加大牙膏管口径的方式增加使用量,以此达到增加牙膏销售量的目的,
某慢性呼吸衰竭病人pH7.3,PaCO2:60mmHg,PaO2:50mmHg,
最新回复
(
0
)