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
Is Earth Getting Warmer? The National Academy of Sciences claimed recently that people should caution rather than panic about th
Is Earth Getting Warmer? The National Academy of Sciences claimed recently that people should caution rather than panic about th
admin
2013-08-12
41
问题
Is Earth Getting Warmer?
The National Academy of Sciences claimed recently that people should caution rather than panic about the greenhouse effect. It is said that the greenhouse effect will result in global warming, which will
elevate
the earth’s temperature by 3~9 degrees Fahrenheit. The greenhouse effect results when carbon dioxide(CO
2
)and certain other gases in the atmosphere allow the sun’s ultraviolet rays to penetrate and warm the earth, but then absorb the infrared energy the earth radiates back into space- much as glass in a greenhouse does—forming a kind of "thermal blanket" around the planet. The greenhouse effect will mean much more than hotter summers and milder winters. It may alter rainfall, affect crop yields and eventually—as glaciers begin to melt—raise the level of the seas. It had long been reported that the earth’s temperature would rise, melting the icecaps, raising the seas, flooding the land. Half of Long Island would be under water. Midwest would become a desert. However, the findings of latest studies have indicated that the earth might not
undergo
warmer temperatures and rather it may experience colder weather.
Due to the variable behavior of the sun, the earth may be confronted with another Ice Age. In the past, concern about a man-made warming of the earth has concentrated on the Arctic because the Antarctic is much colder and has a much thicker ice sheet. But the weather experts are now paying more attention to West Antarctic, which may be affected by only a few degrees of warming: in other words, by a warming on the scale that will possibly take place in the next fifty years from the burning of fuels.(A)
Satellite pictures show that large areas of Antarctic ice are already disappearing.(B)
The evidence available suggests that a warming has taken place. This fits the theory that carbon dioxide warms the earth.(C)
Scientists conclude, therefore, that up to now natural influences on the weather have exceeded those caused by man. The question is: Which natural cause has most effect on the weather?(D)
One possibility is the variable behavior of the sun. Astronomers at one research station have studied the hot spots and "cold" spots(that is, the relatively less hot spots)on the sun. As the sun rotates, every 27. 5 days, it presents hotter or "colder" faces to the earth, and different aspects to different parts of the earth.
This
seems to have a considerable effect on the distribution of the earth’s atmospheric pressure, and consequently on wind circulation, The sun is also variable over a long term: its heat output goes up and down in cycles, the latest trend being downward. Scientists are now finding mutual relations between models of solar-weather interactions and the actual climate over many thousands of years, including the last Ice Age. The problem is that the models are predicting that the world should be entering a new Ice Age and it is not. One way of solving this theoretical difficulty is to assume a delay of thousands of years while the solar effects overcome the inertia of the earth’s climate. If this is right, the warming effect of carbon dioxide might thus be serving as a useful counterbalance to the sun’s
diminishing
heat.
In addition to the variable behavior of the sun, new research has also demonstrated that global warming will probably lead in the end to a period of much colder weather, at least in Europe. Scientists base their theory on what happened the last time the world warmed up, 8 300 years ago. They have discovered that when the ice melted from the northern polar ice cap it became trapped in an enormous lake in northern Canada. As more ice melted this lake suddenly burst open, releasing millions of tons of freezing fresh water into the North Atlantic.
This flood of water was so large that it prevented the normal flow of water in the Atlantic, which takes warm water from the tropics north to Europe and thus temperatures in Europe dropped by between three and eight degrees Celsius over the next two hundred years.
Scientists believe that a similar process could occur in the next century if the Greenland Ice Sheet starts to melt.
The word
this
in Paragraph 3 refers to
选项
A、the effect of the hot and cold aspects by the sun on the earth
B、the distribution of the earth’s atmospheric pressure
C、the solar-weather interactions
D、the warming effect of carbon dioxide
答案
A
解析
本题为指代关系题,考查考生能否认定代词与篇章中其他词语的连接指代关系。题目问:文中的this指代的是什么?第三段第三句说“As the sun rotates,every 27.5 days,itpresents hotter or‘colder’ faces to the earth, and different aspects to different parts of theearth”,即“当太阳运转时,每隔27.5天,它就交替地将其较热或‘较冷’的一面朝向地球,并且由于每个朝向的方位不同也会对地球的不同地区产生不同的影响”。显然,“this”指代的就是前面的整个句子,即“‘这种情况’在很大程度上影响到地球上气压的分布,气流的循环也因此受到影响”,因此选择A。
转载请注明原文地址:https://kaotiyun.com/show/11fO777K
0
托福(TOEFL)
相关试题推荐
Tofindouthowmuchholidayscost,youshouldpressbutton
Whatiscurrentlythemainareaofworkofeachofthefollowingpeople?ChooseFIVEanswersfromtheboxandwritethecorrect
Whatiscurrentlythemainareaofworkofeachofthefollowingpeople?ChooseFIVEanswersfromtheboxandwritethecorrect
JacksaysthatinLondonthesedays,manypeople
ChooseTWOletters,A-E.WhatTWOthingsdoesthearticlesayaboutgoal-setting?AMeetingsshouldstartwithaclearstatemen
Choosethecorrectanswer,A,BorC.TamertonCentreThespeakeradvisespeopletobring
Completethenotesbelow.WriteONEWORDAND/ORANUMBERforeachanswer.DRIVINGSCHOOLExampleAnswerLookingfordrivingless
Completethenotesbelow.WriteONEWORDAND/ORANUMBERforeachanswer.DRIVINGSCHOOLExampleAnswerLookingfordrivingless
随机试题
America—thegreat"meltingpot"—hasalwaysbeenarichblendofculturaltraditionsfromallovertheworld.ManyAmericanfamil
A、血淀粉酶检测B、血清甲胎蛋白检测C、腹部CT检查D、血CEAE、血CRP诊断急性出血坏死型胰腺炎最有意义的检查是
A公司经营资产销售百分比为60%,经营负债销售百分比为30%。假设A公司不存在可动用的金融资产,外部融资销售增长比为5.2%;如果预计A公司的销售净利率为8%,股利支付率为40%,则A公司销售增长率为()。
根据给定材料,回答问题:互联网技术的产业化,被称为第四次工业革命。它的出现,带来了包括银行在内的各个行业的脱媒化变革,使整个供应链架构重新组合并彻底改变了消费者获取服务的方式,推动了世界经济和生产服务的发展。在刚刚结束的2017年夏季达沃斯论坛上
加强行政管理是减少治安危害,建立良好社会秩序的重要手段,是直接维护社会治安秩序的()。
商品的二重性是指价值与交换价值。()
《荷马史诗》
设工程一零件数据库中有4个基本表:供应商(供应商代码,姓名,所在城市,联系电话);工程(工程代码,工程名,负责人,预算);零件(零件代码,零件名,规格,产地,颜色);供应零件(供应商代码,工程代码,零件代码,数量)。
下面关于AMBA的叙述中,错误的是()。
【H1】【H12】
最新回复
(
0
)