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
28
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 fanning 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.
It can be concluded that ______.
选项
A、raising the world’s temperature only a few degrees would not do much harm to life on earth
B、lowering the world’s temperature merely a few degrees would lead many major farming areas to disaster
C、almost no temperature variations have occurred over the past decade
D、the world’s temperature will remain constant in the years to come
答案
B
解析
由第二段第二句话“A drop of just a few degrees. . . ”可知答案。
转载请注明原文地址:https://kaotiyun.com/show/yx3d777K
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
Theworld’senvironmentissurprisinglyhealthy.Discuss.Iftherewereanexaminationtopic,moststudentswouldtearitapart
Mostworthwhilecareersrequiresomekindofspecializedtraining.Ideally,therefore,thechoiceofan【C1】______shouldbemade
Nowadays,airtravelisvery【C1】______WearenotsurprisedwhenwewatchonTVthatapoliticianhastalkedwithFrenchPresiden
Nowadays,airtravelisvery【C1】______WearenotsurprisedwhenwewatchonTVthatapoliticianhastalkedwithFrenchPresiden
Everyoneknowsthattaxationisnecessaryinamodernstate:21it,itwouldnotbepossibletopaythesoldiersandpolicemenw
Accordingtothespeaker,whatshouldonepayspecialattentiontoifhewantstosaveup?
U.S.healthofficialsareincreasingsurveillancemeasuresatdoctors’officesandinternationalborderstoguardagainstthes
Apoliceman.
TheInternetandmobilephoneshavetransformedourconnectionstopeoplearoundtheworld.Thistechnologyhasalso,however,l
TheInternetandmobilephoneshavetransformedourconnectionstopeoplearoundtheworld.Thistechnologyhasalso,however,l
随机试题
内囊膝矢状层面上的结构不包括
朝鲜文学史上第一部具有近代短篇小说因素的传奇集是
《答司马谏议书》中的“司马谏议”是指()
血中Hb含量低于多少时,即使重度缺氧,亦难发现发绀
以下哪项不是小儿的生理特点()
女性,30岁,乏力、活动后心慌1年余。查体眼结膜、口唇苍白,心率110次/分,心尖区可闻Ⅱ级收缩期杂音,化验检查:血红蛋白60g/L,平均红细胞血红蛋白浓度0.25g/dl,平均红细胞体积70fl。血清铁6.2μtool/dl,血清转铁蛋白饱和度0.1,总
A.阿司匹林B.美洛昔康C.萘普生D.对乙酰氨基酚E.双氯芬酸结构中含有苯酚的是
下列表述中,属于企业所得税特点的有( )。
TheImpossibilityofRapidEnergyTransitions[A]Politiciansarefondofpromisingrapidenergytransitions.Whetheritisatra
Women’smindsworkdifferentlyfrommen’s.Atleast,thatiswhatmostmenareconvincedof.Psychologistsviewthesubjecteith
最新回复
(
0
)