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
There was one thought that air pollution affected only the area immediately around large cities with factories and heavy automob
There was one thought that air pollution affected only the area immediately around large cities with factories and heavy automob
admin
2011-01-21
71
问题
There was one thought that air pollution affected only the area immediately around large cities with factories and heavy automobile traffic. At present, we realize 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 east of the United States and brought health warnings in rural areas’ away from any major concentration of manufacturing and automobile traffic. In fact, the very climate of the entire earth may be infected by air pollution. Some scientists consider 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" -- conserving 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 in water.
Another view, less widely held, is that increasing particular 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 a new ice age, and would make agriculture difficult or impossible in many of our top farming areas. Today we do not know for sure that either of these conditions will happen (though one recent government report drafted by experts in the field concluded that the greenhouse effect is very possible). Perhaps, if we are lucky enough, the two tendencies will offset each other and the world’s temperature will stay about the same as it is now.
As pointed out at the beginning of the passage, people used to think that air pollution ________.
选项
A、caused widespread damage in the countryside
B、affected the entire eastern half of the United States
C、had damaged effect on health
D、existed merely in urban and industries areas.
答案
D
解析
由第一段第一句话可推知。
转载请注明原文地址:https://kaotiyun.com/show/lI3d777K
本试题收录于:
公共英语三级笔试题库公共英语(PETS)分类
0
公共英语三级笔试
公共英语(PETS)
相关试题推荐
Electricityplaysanessentialpartinourlife.Noonecandenythatelectriclightisnecessaryforpeople’slife.However,ca
Electricityplaysanessentialpartinourlife.Noonecandenythatelectriclightisnecessaryforpeople’slife.However,ca
Recently,theWorldHealthOrganizationcarriesoutastudyover70,000teensin34nations.Thestudyisamongschoolchildren
Inlessthan30year’stimetheStarTrekholodeckwillbeareality.Directlinksbetweenthebrain’snervoussystemandacomp
MainlanguagesusedfornormallessonsatPacificCollegeare______.
ManyforeignerswhohavenotvisitedBritaincallalltheinhabitantsEnglish,fortheyareusedtothinkingoftheBritishIsle
Whichwordbestdescribesthelawyers’predictionofthechangeindivorcerate?
61)Fathersexposedtopoisonoussubstancesareprobablyjustaslikelytobethecauseofdefectsintheirunborninfantsasmot
61)Fathersexposedtopoisonoussubstancesareprobablyjustaslikelytobethecauseofdefectsintheirunborninfantsasmot
Apoliceman
随机试题
骨骼摄影距离最佳选择是
黄酮类化合物与铅盐反应产生沉淀为
医师在执业活动中应履行的义务之一是
对处方未注明“生用”的毒性中药,应当付炮制品。()
波长为λ的单色平行光垂直入射到一狭缝上,若第一级暗纹的位置对应的衍射角为θ=±π/6,则缝宽的大小为:
直线制组织结构的优点有()。
按照投资的风险分散理论,以等量资金投资于A、B两项目。()
已知箱中装有4个白球和5个黑球,且规定:取出一个白球得2分,取出一个黑球得1分.现从该箱中任取(无放回,且每球取到的机会均等)3个球,记随机变量X为取出3球所得分数之和.求X的分布列;
(1)受理(2)取证(3)判决(4)调查(5)起诉
对考生文件夹下的表“书目”,使用查询向导建立查询bookquery,查询价格在15元(含)以上的书籍的所有信息,并将查询结果保存在一个新表“bookinfo”中。
最新回复
(
0
)