首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
It was once thought that air pollution affected only the area immediately around large cities with factories and heavy automobil
It was once thought that air pollution affected only the area immediately around large cities with factories and heavy automobil
admin
2017-08-23
36
问题
It was once thought that air pollution affected only the area immediately around large cities with factories and heavy automobile traffic. Today, we know that although these are the areas with the worst air pollution, the problem is literally worldwide. On several occasions over the past decade, a heavy cloud of air pollution has covered the entire eastern half of the United States and led to health warnings even in rural areas away from any major concentration of manufacturing and automobile traffic. In fact, the very climate of the entire earth may be affected by air pollution.
Some scientists feel that the increasing concentration of carbon dioxide in the air resulting from the burning of fossil fuels (coal and oil) is creating a "greenhouse effect"—holding in heat reflected from the earth and raising the world’s average temperature. If this view is correct and the world’s temperature is raised only a few degrees, much of the polar ice cap will melt and cities such as New York, Boston, Miami, and New Orleans will be under water.
Another view, less widely held, is that increasing particulate matter in the atmosphere is blocking sunlight and lowering the earth’s temperature—a result that would be equally disastrous. A drop of just a few degrees could create something close to new ice age and would make agriculture difficult or impossible in many of our top farming areas.
At present we do not know for sure that either of these conditions will happen, though one recent government report prepared by experts in the field concluded that the greenhouse effect is very likely. Perhaps, if we are very lucky, the two tendencies will offset each other and the world’s temperature will stay about the same as it is now.
According to the passage, people today think that air pollution________.
选项
A、exists merely in urban and industrial areas
B、may have an effect on the entire earth
C、causes widespread damage in the countryside
D、is not so serious as it used to be
答案
B
解析
由题干中“people today think that air pollution”可以定位到文中第一段第二句话。该句提到如今我们知道即使这些地区的空气污染最严重,但是准确来讲这个问题是全球性的。由此可知,今天的人们认为空气污染有全球性的影响。
转载请注明原文地址:https://kaotiyun.com/show/Ndi7777K
0
大学英语四级
相关试题推荐
A、It’sdull.B、It’sfun.C、It’ssimple.D、It’scomplicated.C比较句型要反应快,本题关键在于听清lesscomplicated,即simple,故选C。
A、Amanager.B、Anofficial.C、Adriver.D、Apostalclerk.C女士说:“请在曼哈顿邮局让我下车。”男士回答说:“哦,有1个小时的车程呢。何不……?”可见女士是在车上和司机说话,C正确。关键词drop和
Aroundtheworld,thereareanumberofdifferenttraditionsthatformpartofthecultureandcanrepresenteithergoodorbad
Aroundtheworld,thereareanumberofdifferenttraditionsthatformpartofthecultureandcanrepresenteithergoodorbad
Facingapotentialclimatedisaster,theworld’sgovernmentsagreedtolimitaglobalrisein【B1】______temperaturebytheend
Itshouldcomeasnosurprisethatthemorestressedparentsareatwork,thegreatertheburdenontheirfamily.It’salsoprob
A、Thefurnishedapartmentwasinexpensive.B、Theapartmentwasprovidedwithsomeoldfurniture.C、Thefurnitureinthemarketw
TheBritishgovernmentrecentlyannouncedaproposaltointroducehealthcareaccessfeesformigrantsandlong-termvisitorsth
A、Theywilltelldriverstheaccidentontheroadahead.B、Theywillreminddriversifthereisonlyalittleoilleft.C、Theyw
Juicemaybetasty,butit’snotreallythatnourishing.Whileorangejuiceisan【B1】_____sourceofvitaminC,itdoesn’tconta
随机试题
甲市A公司以信件方式向乙市B公司发出承诺通知。A公司于3月4日将信件送达甲市邮局,到达乙市邮局的日期为3月6日,该信件送达B公司收发室的日期为3月7日,公司总经理阅读该信件的日期为3月9日。A公司承诺生效的时间为()
体态肥胖的成年2型糖尿病病人,GHbA1c为7%,初治首选措施是( )。
性味咸寒,功能消痰软坚,利水、消肿,煅用制酸止痛的药是
基金财务会计报表一般不包括()。
下列说法,符合房产税规定的是()。
甲企业购入某上市公司股票并划分为交易性金融资产,下列各项中,不应计入交易性金融资产入账价值的有()。
阅读《荷塘月色》的教学实录片段,回答问题。师:朱自清的这篇散文是有名的美文,请大家讨论一下,说说自己觉得最美的句子并简述理由。生:我最喜欢“层层的叶子中间,零星地点缀着些白花,有袅娜地开着的,有羞涩地打着朵儿的;正如一粒粒的明珠,又如碧天里的星星,又如
二战时期,盟军统帅艾森豪威尔指挥盟军实施了历史上规模最大的诺曼底登陆战役,奠定了盟军反败为胜的契机。艾森豪威尔能把多国的庞大武装力量合为一体,协调行动、共同战斗,足见其统帅能力非常人能及。随后,艾森豪威尔又以压倒性的胜利,击败声望极高的政坛老手史蒂文生,出
阅读下列材料,回答问题。卢某在Y物业公司从事保安工作,双方签订了书面劳动合同。某日,卢某在Y物业公司提供物业服务的住宅小区值班站岗时突然晕倒在地,导致受伤,卢某的主治医师在调查笔录中认为卢某此次受伤有可能导致癫痫。后卢某以在工作时间和工作场所内,
A、Hewondersifhehasenoughtimeforthejob.B、Heisafraidheisnotexperiencedenough.C、Heisafraidthatthejobmaybe
最新回复
(
0
)