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
24
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.
The word "offset" (Line 3, Para. 4) means________.
选项
A、slip into
B、catch up with
C、set up
D、make up for
答案
D
解析
由题干中“offset”可以定位到文中最后一段最后一句话。该句提到如果这两种趋势能够中和一下,那全球的气温会跟现在差不多,由此可推断出“offset”意为“中和,抵消”。
转载请注明原文地址:https://kaotiyun.com/show/kdi7777K
0
大学英语四级
相关试题推荐
GoingtosummercampisalongtraditionintheUS.Some8millionchildrenagedbetween6and18attendover10,000campseach
EarthHourisanannualglobalcampaignthatencouragespeopleandbusinessesaroundtheworldtoswitchoff【B1】______atthesa
Facingapotentialclimatedisaster,theworld’sgovernmentsagreedtolimitaglobalrisein【B1】______temperaturebytheend
Itshouldcomeasnosurprisethatthemorestressedparentsareatwork,thegreatertheburdenontheirfamily.It’salsoprob
近年来,越来越多的中国学生赴美留学。去年,美国进行了一项针对高校留学生的调查研究。该调查表明,2011—2012学年间来自中国的高校留学生总人数超过了19万,这使得中国连续三年成为美国最大的留学生来源国(senderofstudents)。而在2002
Todaywetalkaboutthedifferencebetweenacollegeandauniversity.Collegesanduniversitieshavealotincommon.Theyprep
ProfessorSmithrecentlypersuaded35people,23ofthemwomen,tokeepadiaryofalltheirabsent-mindedactionsforafortnig
I’musuallyfairlyskepticalaboutanyresearchthatconcludesthatpeopleareeitherhappierorunhappierormoreorlesscerta
HowAdvertisementIsDone?A)Whenwechooseawordwedomorethangiveinformation;wealsoexpressourfeelingsaboutwha
HowAdvertisementIsDone?A)Whenwechooseawordwedomorethangiveinformation;wealsoexpressourfeelingsaboutwha
随机试题
Accordingtotheb________viewofmeaningstudy,themeaningofalinguisticformisthesituationinwhichthespeakeruttersi
小面积烧伤初期可用小面积烧伤后期腐脱新生时可用
根据房地产经经机构是否通过店铺来承接和开展房地产经纪业务,房地产经纪机构的经营模式可分为:()。
即将退役的运动员林建明先生打算自己创业,但其面临许多困惑,需要金融理财师协助规划。经过初步沟通面谈后,你获得了以下家庭、职业与财务信息:一、案例成员二、收支情况林建明的收入不确定,田虹每月税后收入4000元;家庭主要开销:每个月生活费1万元。三、
可以回购本公司股票的情形不包括()。
下列属于山西名点小吃的是()。
将钠、镁、铝各0.3mol分别放入100mL1mol.L-1的盐酸中,同温同压下产生的气体的体积比是()。
根据下列资料,回答下列问题。已知2010年该省限额以下批发和零售业企业零售额相比于2009年年同期增幅为18.7%,那么2009年该省限额以下批发和零售业企业零售额约为()。
蔡戈尼效应:指对未完成的工作比对已完成的工作有较好的记忆效果的现象,1927年由德国心理专家蔡戈尼在记忆试验中发现。下列属于蔡戈尼效应的是()。
在Access数据库中,表是由
最新回复
(
0
)