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
72
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.
ServiceasanidealhasspreadoutintomanybranchesofAmericanlife.Moreandmoretheinstitutionofacommunityareexpecte
Onethingalmosteveryoneisagreedon,includingAmericans,isthattheyplaceaveryhighvaluationuponsuccess.Successdoes
A、Byaskinghisfriend.B、Bycallingthetelephoneoperator.C、Byreferringtothereceptionist.D、Byfindingitinthephonebo
Womenare,onthewhole,moreverbalthanmen.Theyaregoodatlanguageandverbalreasoning,whilementendtobeskilledatt
Citytrafficjam—oneoftheleastwantedeffectsofthemotorvehicle—issomethingwithwhichwe’reallfamiliarandforwhichm
Ifyoudonotuseyourarmsorlegsforsometime,theybecomeweak;whenyoustartusingthemagain,theyslowlybecomestrong
MarkClements,53,agarageman,hadlonganduntidyhair.LauraShira,43,whogiveshaircuts,neededcarrepairs.Ratherthan【3
Theyovercameallthedifficultiesandfulfilledtheplantendaysaheadofschedule,______wassomethingwehadnotexpected.
(非英语类学生必做)IarrivedintheUnitedStates【61】February6,1986,butIremembermyfirstdayherevery【62】Myfriendwaswa
随机试题
X线摄影中表示X线量的是
心力衰竭的病机是本虚标实,其中标实不包括
A.蠲哮片B.人参保肺丸C.小青龙胶囊D.右归丸E.蛤蚧定喘丸主治支气管哮喘急性发作的是()。
下列关于药物制剂稳定性的叙述中,哪一项是错误的()。
产生国际避税的内在动机是()。
按照随机模式,确定现金存量的下限时,应考虑的因素是()。
在影响性技术中,()技术对求助者的影响力最为明显。
A.forgeB.tracesC.privateD.fearE.puzzlesF.helpfulG.createsH.freeI.guardJ.calmnessK.explainsL.probl
VocationalSchoolsTheuniversitiesarenotabletomeetallthe【T1】______needsofthesocietyforfuture【T2】______.Vocati
RecyclingOneofthemostimportantchangesinhowmodernsocietiesrespondtotheproblemsofwasteanditsdisposalisthe
最新回复
(
0
)