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
67
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
Whichoffollowingbestdescribesthemainideaofthepassage?______.Since1870,Americanshavewitnessed______.
InAmericansociety,one’ssuccessismeasuredby______.Intermsofsuccess,thePuritansvalueworkhighbecause______.
Hethoughtthatthebadworkingconditionswouldresultinthestrikeoftheworkers.
Accordingtothepassage,peoplewhooffendedthelawmaybe______.Accordingtothepassageequalrightslawmayrefertothe
"Whydidyouleavethemeetingearly?""Ifoundthediscussion______."
A______(horrify)screamwasheardatthedarkmidnight.
A、Atarailwaystation.B、Onaflight.C、Inahospital.D、Inareading-room.C
Althoughsomeareassufferedfromseriousnaturaldisasters,thetotalgrainoutputwashigherthanthatoflastyear.
Inolddays,whenaglimpseofstockingwaslookeduponassomethingsoshockingastodistracttheseriousworkofanoffice,s
Nosooner______theplane______thanthewaitingcrowdrantowardit.
随机试题
中共中央确定对国民经济实行“调整、巩固、充实、提高”方针的会议是()。
“己所不欲,勿施于人。”这句话反映的是哪种道德观()
什么是社会主义市场经济体制?它的基本特征有哪些?
新生儿早期患呼吸道感染的可能因是
建设工程项目质量控制系统运行机制的核心是()。
我国央行首要调控的货币是M0和M1。()
()鲜明地体现了基础教育的本质属性和基本特征。
加强党的执政能力建设的历史动力有()。
()对于奋不顾身相当于见利忘义对于()
初秋的天空是蓝色的,没有云的_______,喷射机恣意地在天幕上划下白线。阳光挥霍瀑洒,_______了所有的树叶,树叶是千万片的红黄金紫,在空中、风中绚烂地翻动。依次填入画横线部分最恰当的一项是()。
最新回复
(
0
)