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
专升本
Once somebody thought that air pollution affected only the area immediately around large cities with factories and heavy automob
Once somebody thought that air pollution affected only the area immediately around large cities with factories and heavy automob
admin
2008-01-17
59
问题
Once somebody 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 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. 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.
It can be inferred from the passage that______.
选项
A、raising the world’s temperature only a few degrees would not do much harm to life on the earth
B、almost no temperature variations have occurred over the past decade
C、lowering the world’s temperature merely a few degrees would lead many major farming areas to disaster
D、the world temperature will remain constant in the years to come
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/OTLC777K
本试题收录于:
英语题库普高专升本分类
0
英语
普高专升本
相关试题推荐
在下列题中利用级数的件质和判别方法判断级数的敛散件.
Historianscan’ttelluswhen,whereor【71】thefirstfoodwascooked.Inearliest【72】whenpeoplehadeatentheirfood【73】,
Teachersaresupposedtobepatientandnottolosetheirtempernomatterwhatmistakestheirstudentsmake.
Don’tforget______whenyouarefinishedwiththeelectriciron.
A、Visitinganexhibition.B、Travellingatour.C、Attendingameeting.D、Doingabusiness.C
A、It’snotimportanthowshedances.B、Ifshe’scareful,noonewillnotice.C、It’stoocrowdedtodanceanyway.D、Nooneknows
Noonehasyetsucceededinexplainingthe______ofhowlifebegan.
Thechildwassorry______hismotherwhenhearrivedatthestation.
ForanyEnglishman,therecanneverbeanydiscussionastowhoistheworld’sgreatestpoetandgreatestdramatist.Onlyonena
Clothingmadeofman-madefibershascertainadvantagesover______madeofnaturalfiberslikecotton,woolorsilk.
随机试题
下列选项中,不是用光滑尖探针检查的项目是
患者,女性,58岁。牙列缺失,要求修复。开始补充氟滴剂的剂量是
纳税人因有特殊困难,不得按期缴纳税款的,经省、自治区、直辖市国家税务局、地方税局批准,可以延期缴纳税款,但是最长不得超过3个月。 ( )
上海证券代码为一组()数字。
当社会对物业管理的需求越来越高时,按照公司法组建的专业化的物业管理公司也应运而生。在此基础上,()的物业管理体制得以确立,并在全国迅速发展。
据海关统计,2010年1至11月,我国进出口总值26772.8亿美元,比去年同期(下同)增长36.3%。其中出口14238.5亿美元,增长33%;进口12534.3亿美元,增长40.3%。在出口商品中,1至11月,我国机电产品出口8427.4亿美元,增长3
真实的历史事实及其史料依据,是历史叙事的基本要素。历史学的任务不仅是考证历史事实,还应该完整地还原出历史人物、历史事件和历史过程的面貌。为此,历史研究者需要把各种历史事实加以联结和组合。而主张后现代主义史学理论的学者认为,历史研究者可以在不违反学科规范的前
YOURBUILDINGSERVICE√Wehelppeopleinthispartofthecityby:checkingallplans(方案)beforepeoplebuildnewhous
America’sDiplomaticChallengesVocabularyandExpressionscombatmissionTalibanseparatistDepartmentofDe
TheInternetisagiantnetworkofcomputerslocatedal]overtheworldthatcommunicatewitheachother.TheInternetisan
最新回复
(
0
)