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
考研
There are hidden factors which scientists call "feedback mechanisms". No one knows quite how they will interact with the changin
There are hidden factors which scientists call "feedback mechanisms". No one knows quite how they will interact with the changin
admin
2005-06-26
126
问题
There are hidden factors which scientists call "feedback mechanisms". No one knows quite how they will interact with the changing climate. Here’s one example: plants and animals adapt to climate change over centuries. At the current estimate of half a degree centigrade of warming per decade, vegetation(植物)may not keep up. Climatologist James Hansen predicts climate zones will shift toward the poles by 50 to 75 kilometres a year— faster than trees can naturally migrate. Species that find themselves in an unfamiliar environment will die. The 1,000-kilometre-wide strip of forest running through Canada, the USSR and Scandinavia could be cut by half. Millions of dying trees would soon lead to massive forest fires, releasing tons of CO
2
and further boosting global warming.
There are dozens of other possible "feedback mechanisms". Higher temperatures will fuel condensation and increase cloudiness, which may actually damp down global warming. Others, like the "albedo" effect, will do the opposite. The "albedo" effect is the amount of solar energy reflected by the earth’s surface. As northern ice and snow melts and the darker sea and land pokes(戳)through, more heat will be absorbed, adding to the global temperature increase.
Even if we were to magically stop all greenhouse-gas emissions tomorrow the impact on global climate would continue for decades. Delay will simply make the problem worse. The fact is that some of us are doing quite well the way things are. In the developed world prosperity has been built on 150 years of cheap fossil fuels.
Material progress has been linked to energy consumption. Today 75 percent of all the world’s energy is consumed by a quarter of the world’s population. The average rich world resident adds about 3. 2 tons of CO
2
yearly to the atmosphere, more than four times the level added by each Third World citizen. The US, with just 7 percent of the global population, is responsible for 22 percent of global warming.
We can learn from the passage that______.
选项
A、some feedback mechanisms may slow down global warming
B、the basic facts of global warming are unknown
C、developing countries benefit from cheap fossil fuels
D、developed countries have decided to reduce their energy consumption
答案
A
解析
文章第一段“There are hidden factors which scientists call‘feedback mechanisms’.No one knows quite how they will interact with the changing climate.”有一些隐形因素,科学家叫做“反馈机制”。没有人完全了解它们将如何与变化的气候相互作用。第二段接着讲到“There are dozens of other possible‘feedback mechanisms’.Higher temperatures will fuel condensation and increase cloudiness,which may actually damp down global warming.Others,like the‘albedo’effect,will do the opposite.”可能还有许多其他的“反馈机制”。更高的温度将加速凝结,增加朦胧度。实际上,这可能抑制全球变暖。其他的机制,如“反射”效应,其作用相反。可见,“反馈机制”中有的可能促进全球变暖,有的可能抑制全球变暖。A项符合文章的意思。B、C项的内容与文意不符,D项不属于文章中表述的内容。因此本题的正确答案为A。
转载请注明原文地址:https://kaotiyun.com/show/YTmi777K
0
在职申硕(同等学力)英语
相关试题推荐
What’syourearliestchildhoodmemory?Canyourememberlearningtowalk?Ortalk?Thefirsttimeyou【C1】______thunderorwatche
ChildrenintheUnitedStatesareexposedtomanyinfluences______thoseoftheirfamilies.
Insomeways,theUnitedStateshasmadespectacularprogress.Firesnolongerdestroy18,000buildingsastheydidintheGreat
We(cannothardly)expectadolescents(tohaverespect)forthepossessionsofothers(if)theyhavenohopeofattaininganyof
Woman:Now,Richard,wouldyoucaretoexplainhowtheanswerstothetestquestionsappearedonyourdesk?Man:Ican’t,Profes
TheCommitteepronouncedfourmembersexpelledforfailuretoprovideinformationinthe______ofinvestigations.
Man:It’syourownfault.Youshouldn’tletanyoneinunlessyouareexpectinghim.Woman:It’sallverywelltosaythat,butso
Wilmutmaintainsthatcloninganimalshastremendouspotentialforhelpingpeople.ClonedSheep,hesays,couldbeusedaslivin
Whatareblackholes?Thisquestionisdifficulttoanswer,sincewedonothavethenecessarywordstodescribethem.Scientist
Itisgenerallybelievedthatnoprisonerwouldreadilygiveafellowprisoneraway.
随机试题
结节间沟底部骨质增生易发生:上肢过度外展和后伸时易发生:
某学校学生在食用食堂供应的蛋炒饭后出现中毒症状,表现为恶心、呕吐、腹泻、腹痛,体温正常。事后调查发现,蛋炒饭是前两天剩下的米饭做的。这是一起()
A.3/4冠B.塑料冠C.嵌体D.金属全冠E.烤瓷全冠
库存现金日记账一般采用()账簿。
新建项目属于内涵式扩大再生产类型。()
依据我国《公司法》的规定,可以发行股票的公司是()。
兰兰是个幼儿园中班的孩子,一次,她拿起纸和笔画画,画之前她自言自语地说:“我想画小猫咪。”先画了猫头、猫耳朵,再画猫眼。然后画了条线,说这是草地,在上面画了绿草小花,接着又画了只兔子,边画边说:“哎呀,不像,不像,像什么呀,像小托车。”这时,她又忽然想起来
赵亮是计算机学院大二的学生,他通过了计算机等级测试,所以计算机学院大二的学生都通过了计算机等级测试。以下哪项与上述论证方法最相似?
设可微函数f(x,y)在点(xo,yo)取得极小值,则下列结论正确的是
A、Itencouragedpeopletoinvent.B、Itprotectedpeople’sinvention.C、Itpublicizedideasthatmightbekeptastradesecrets.
最新回复
(
0
)