首页
登录
职称英语
There was one thought that air pollution affected only the area immediately a
There was one thought that air pollution affected only the area immediately a
游客
2025-03-01
16
管理
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 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. [br] 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
推理题。根据文章第一段最后一句可知,全球温度只增加几度就会引起极地的大部分冰帽融化,导致有些城市被淹没,选项A(温度只增加几度不会对地球上的生命产生危害)错误。根据第二段第二句可知,全球温度只下降几度就可能带来一个新的冰河时代,许多高海拔区域的农业生产将很难或无法开展,选项B(温度只下降几度会给许多主要农业区域带来灾难)正确。选项C(在过去十年里气温几乎没有变化)文中未提及。根据第二段最后一句可知,如果我们足够幸运,也许这两种趋势将相互抵消,全球温度不变。这只是一种猜测的情况,故选项D(未来几年全球温度将保持不变)错误。故本题选B。
转载请注明原文地址:https://tihaiku.com/zcyy/3977520.html
相关试题推荐
AtfirstIthoughtthatmathproblemwouldberatherdifficult,butit______to
Inasecond-handbookshop,Billycameacrossabookwhichhethoughtwascertain
ForJohnthiswasthebeginningofanewlife,______hethoughthewouldnevers
InevertrustedhimbecauseIalwaysthoughtofhimassucha______character.A、
Thegirlimmediatelyshutthewindowto______therain.A、keepoutB、keepdownC、
Weagreetoaccept______theythoughtwasthebesttouristguide.A、whateverB、whi
LincolnthoughtitwaswrongtokeepNegroes______slaves.A、inB、asC、forD、atDk
LincolnthoughtitwaswrongtokeepNegroes_________slaves.A、inB、asC、forD、at
Untilrecentlyitwasthoughtthatinkusedbeforethesixteenthcenturydidnot
Neighboringlandholders:Airpollutionfromthegiantaluminumrefinerythathas
随机试题
Forthispart,youareallowedthirtyminutestowriteacompositionOnthet
TheclimateinSouthChina,whererainsandstormsarecommonoccurrences,ismu
[originaltext]Overthepastdecade,theenvironmentalmovementhasexploded
[originaltext]Manisalandanimal,butheisalsocloselytiedtothesea.
某独立建造建筑面积为8000㎡的地下一层商场,按照国家规定设置了相应的消防设施,
口气腐臭兼咳吐脓血者多为A、食积胃肠 B、胃热 C、内有溃腐 D、牙
反复呼吸道感染脾肾两虚证的治法是()A.养阴润肺,益气健脾 B.温补肾阳
决定利率水平高低的重要因素是()。A:资金的供求状况 B:商业周期 C:利
乘坐过飞机的旅客可能都注意到了,飞机在飞行途中时常会有一些抖动,尤其在穿越较厚的
下列内容中,属于项目管理效能评价应关注内容的有()。A.设计能力 B.规章制
最新回复
(
0
)