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
2013-11-21
121
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
语义题。此句意思是:但如果我们非常幸运,这两种趋势或许会相互offset,地球气温会像现在一样,保持不变。由此可知,“offset”在文中的意思应为“弥补,抵消”。故答案为D。
转载请注明原文地址:https://kaotiyun.com/show/AkS7777K
0
大学英语四级
相关试题推荐
A、Becauseshethoughtmanandwomanshouldbeequal.B、BecausethepresidentWashingtonaskedhertodoso.C、Becauseshewanted
WhatisanElNinoAnElNinoisatemporarychangeintheclimateofthePacificOcean,intheregionaroundtheequator.Y
WhatisanElNinoAnElNinoisatemporarychangeintheclimateofthePacificOcean,intheregionaroundtheequator.Y
WhatisanElNinoAnElNinoisatemporarychangeintheclimateofthePacificOcean,intheregionaroundtheequator.Y
WhatisanElNinoAnElNinoisatemporarychangeintheclimateofthePacificOcean,intheregionaroundtheequator.Y
WhatisanElNinoAnElNinoisatemporarychangeintheclimateofthePacificOcean,intheregionaroundtheequator.Y
A、Shefeltitwastiring.B、Shefeltitwasverynice.C、Shethoughtittooklesstime.D、Shethoughtitwasexpensive.BM:Did
Newsagencyisalsocallednewsservice【B1】______,whichcollects,writes,anddistributesnewsfromaroundanationortheworl
随机试题
集体合同包括下列内容()
Whenwomendobecomemanagers,dotheybringadifferentstyleanddifferentskillstothejob?Aretheybetter,orworse,manag
A.100%B.90%C.50%D.10%根据《中共中央国务院关于深化医药卫生体制改革的意见》我国现行基本药物制度中规定基本药物报销的比例是()。
某储户2002年5月1日存入银行定期存款1000元,存期一年,假设存入时该档次存款年利率为3%,该储户于2003年6月1日才支取这笔存款,若支取日挂牌公告的活期储蓄存款年利率为1.89%(不考虑利息税)。该储户一年到期的利息为()。
在营运资金管理中,企业将“介于支付现金与收到现金之间的时间段”称为()。
免费邮件服务是Intemet的一项优惠服务措施。()
人体形成尿液的结构和功能单位是:
Recentyearshavewitnessedanincreaseinthenumberofpeoplewhofeelguiltyorashamedaboutwhattheyperceivetobenegati
•Readthefollowingextractfromanarticleaboutmonopolisticcompetition,andthequestionsfollowed.•Foreachquestion15—20
Tofindoutwhattheweatherisgoingtobe,mostpeople【B1】______theradio,television,ornewspapertogetanexpertweatherf
最新回复
(
0
)