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
It was once thought that air pollution affected only the area immediately around large cities with factories and heavy automobil
It was once thought that air pollution affected only the area immediately around large cities with factories and heavy automobil
admin
2013-11-21
87
问题
It was once 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 particulate 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 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.
The word "offset"(Line 3, Para. 4)means______.
选项
A、slip into
B、catch up with
C、set up
D、make up for
答案
D
解析
语义题。此句意思是:但如果我们非常幸运,这两种趋势或许会相互offset,地球气温会像现在一样,保持不变。由此可知,“offset”在文中的意思应为“弥补,抵消”。故答案为D。
转载请注明原文地址:https://kaotiyun.com/show/AkS7777K
0
大学英语四级
相关试题推荐
A、Becauseshethoughtmanandwomanshouldbeequal.B、BecausethepresidentWashingtonaskedhertodoso.C、Becauseshewanted
WhatisanElNinoAnElNinoisatemporarychangeintheclimateofthePacificOcean,intheregionaroundtheequator.Y
WhatisanElNinoAnElNinoisatemporarychangeintheclimateofthePacificOcean,intheregionaroundtheequator.Y
WhatisanElNinoAnElNinoisatemporarychangeintheclimateofthePacificOcean,intheregionaroundtheequator.Y
WhatisanElNinoAnElNinoisatemporarychangeintheclimateofthePacificOcean,intheregionaroundtheequator.Y
WhatisanElNinoAnElNinoisatemporarychangeintheclimateofthePacificOcean,intheregionaroundtheequator.Y
Newsagencyisalsocallednewsservice【B1】______,whichcollects,writes,anddistributesnewsfromaroundanationortheworl
随机试题
下列不属于公司资本原则的是()
世界上第一台电子计算机称为_________(英文大写简称)。
心室功能曲线反映下列哪种关系
PACS的主要任务是把医学影像以数字化的方式保存起来,当需要的时候能够快速调取浏览和使用;并同时具有图像诊断和图像管理功能;发展至今,PACS系统根据其规模大小可划分为:基于影像科室或某个部门的小型PACS系统,将影像服务扩展到医院的院级大型PACS系统,
《医疗用毒性药品管理办法》规定,收购、经营、加工、使用毒性药品的单位必须健全的制度有
文书校对时,应该()。
材料:材料1:贫困大学生上学的“救急钱”——国家助学贷款在今年走入申贷两难的困境:由于毕业大学生还贷情况不佳,贷款风险凸现,部分高校的助学贷款已经暂停。据了解,不少高校毕业生此项贷款的违约率超过了20%,有的高校甚至达30%~40%
下列关于法律解释的表述,能够成立的有()。
甲以迷信方式恐吓刘某有灾祸,刘某一时慌乱,请甲帮助自己。甲让刘某带10万元现金作“镇邪物”,找法师“消灾”。途中,甲趁帮刘某拿包之机,用书本调换了10万元现金。甲的行为构成()。(2012年单选17)
TheinternationalconferenceofaiddonorstoEastTimorisscheduledon______.
最新回复
(
0
)