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 autom
There was one thought that air pollution affected only the area immediately around large cities with factories and heavy autom
admin
2011-01-21
64
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 rai- sing 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.
This passage is primarily about_______.
选项
A、the greenhouse effect
B、the burning of fossil fuels
C、the potential effect of air pollution
D、the likelihood of a new ice age
答案
C
解析
文章是在讨论大气污染给人类带来的潜在影响。
转载请注明原文地址:https://kaotiyun.com/show/bl3d777K
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
Inthe1960stheWestCoastbecameanimportantcenterforrockmusic.LosAngelesandSouthernCaliforniaarefamousforsunshi
Inthe1960stheWestCoastbecameanimportantcenterforrockmusic.LosAngelesandSouthernCaliforniaarefamousforsunshi
Ihavenoticedthatchildrenarenotevenbeingschoolinsocialgraces.AtaSundaybrunch,aclownwasmakingballoonanimals
Ihavenoticedthatchildrenarenotevenbeingschoolinsocialgraces.AtaSundaybrunch,aclownwasmakingballoonanimals
Ihavenoticedthatchildrenarenotevenbeingschoolinsocialgraces.AtaSundaybrunch,aclownwasmakingballoonanimals
SlaveryhasplayedasignificantroleinthehistoryoftheU.S.ItexistedinalltheEnglishmainlandcoloniesandmostofth
Howeverimportantwemayregardschoollifetobe,thereisnodenyingthefactthatchildrenspendmoretimeathomethaninth
Howeverimportantwemayregardschoollifetobe,thereisnodenyingthefactthatchildrenspendmoretimeathomethaninth
Pollutionisa"dirty"word.Topollutemeanstocontaminate—topsoilofsomethingbyintroducingimpuritieswhichmake【B1】______
Apoliceman
随机试题
A.血府逐瘀汤B.膈下逐瘀汤C.通窍活血汤D.八珍汤E.杞菊地黄丸
暑疖的用方是锁喉痈的用方是
客运索道是景区承载乘客的重要设施,根据《客运索道安全监督管理规定》可知,下列关于客运索道的安全管理中,符合要求的是()。
教育储蓄的对象为在校小学()以上学生。
甲为有限合伙企业的有限合伙人,经全体合伙人一致同意,甲转为普通合伙人,下列关于甲对其作为有限合伙人期间有限合伙企业发生的债务责任的表述中,符合合伙企业法律制度规定的是()。
将公安队伍的组成人员分为警官、警员、专业技术人员、辅助人员四大类进行管理,是()的内容。
下列情形中,人民法院可以一并审理民事争议的是()。
数据库系统依靠______支持数据独立性。
Attractingnewcustomersandwithoutmaintaininggoodcustomer【S1】______relationshipisthefirstandtheoutmost
A、Hewenttoafamousschool.B、Hewastaughtbyhismother.C、Hisparentsemployedagoodteachertoteachhim.D、Hewastaught
最新回复
(
0
)