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
In the atmosphere, carbon dioxide acts rather like a one-way mirror—the glass in the roof of a greenhouse which allows the sun’s
In the atmosphere, carbon dioxide acts rather like a one-way mirror—the glass in the roof of a greenhouse which allows the sun’s
admin
2019-06-23
88
问题
In the atmosphere, carbon dioxide acts rather like a one-way mirror—the glass in the roof of a greenhouse which allows the sun’s rays to enter but prevents the heat from escaping.
According to a weather expert’s prediction, the atmosphere will be 31 warmer in the year 2050 than it is today, if man continues to burn fuels at the present rate. If this warming up took place, the ice caps in the poles would begin to melt, thus raising sea level several meters and severely flooding coastal cities. Also, the increase in atmospheric temperature would lead to great changes in the climate of the northern hemisphere, possibly resulting in an alteration of the earth’s chief food-growing zones. 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.
Satellite pictures show that large areas of Antarctic ice are already disappearing. The evidence available suggests that a warming has taken place. This fits the theory that carbon dioxide warms the earth.
However, most of the fuel is burnt in the northern hemisphere, where temperatures seem to be falling. 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?
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(惯性)of the earth’s climate. If this is right, the warming effect of carbon dioxide might thus be serving as a useful counter-balance to the sun’s diminishing heat.
On the basis of their models, scientists are of the opinion that _____.
选项
A、the climate of the world should be becoming cooler
B、it will take thousands of years for the inertia of the earth’s climate to take effect
C、the man-made warming effect helps to increase the solar effects
D、the new Ice Age will be delayed by the greenhouse effect
答案
A
解析
最后一段的第2句提到“科学家们研究的结果应该是地球进人新的冰川时期,然而却没有出现这种情况”,这与A项的内容吻合。D项为本题的强干扰项,根据文章,该项的含义正确。但就本题而言,题干针对的是models(模型),因而判断范围只能针对solar-weather interactions,即太阳的作用。
转载请注明原文地址:https://kaotiyun.com/show/UJX7777K
0
大学英语六级
相关试题推荐
Fertilizerusehasexploded,overloadingplantsworldwide,likelyalteringecosystemsfordecadestocenturies,scientistsrepor
A、Findingagoodjobinafamousinternationalcompany.B、Shapingthefutureofyourcountryandthewholeworld.C、Bringinghon
Utopiaisaperfectplace.Itisaplacewithoutwar,hunger,poverty,orcrime.Itisaplacewherethepeopleworktogetheran
WhySustainableBuildingsNeedtoFocusonCommunityAndCollaboration?[A]Accordingtothegovernment,buildingsintheUKacc
A、Therearemoremalegeniusesthanfemalegeniuses.B、PeoplewithbetternutritionaremuchmoreintelligentC、Femaleshavewea
Secondhandsmokeisaccountablefor42,000deathsannuallytononsmokersintheUnitedStates,includingnearly900infants,acc
A、Finances,timeandproperty.B、Tuition,spendingandrelationships.C、Money,safetyandtimelimitations.D、Experience,spendi
A、Laughingisalearnedbehavior.B、Laughingisagoodmedicinetopatients.C、Laughingiseasierthanbattlingwithanillness.
A、Itmadepeoplehappier.B、Itdidmoreharmthangood.C、Itincreasedrisks.D、Itmadepeoplesick.B演讲人在介绍完自己的职业后,用转折句对过去十年的工作
A、Ahousewife.B、Asinger.C、Ateacher.D、Amusician.D读选项可预测是问人物的身份。短文开篇就提到Midori小时候喜欢玩妈妈的小提琴,她妈妈那时是一个年仅30岁的职业音乐人(a30-year-old
随机试题
ModernmusicWhyitispopularforits【A6】________andrhythmicbeat.ItsoriginsCountrymusicfeatures【A7】_____
患者,男,36岁。发热2周,左颈部疼痛10天入院。2周前无诱因出现发热,体温37.8~39.3℃,午后明显,10天前左颈部疼痛,疼痛向左下颌、左耳部放散。吞咽时加重。给予抗炎治疗效果欠佳。体重下降3kg。提示:门诊资料:白细胞5.6×109/L,血沉1
急性血吸虫病常见的热型是弛张热。
某甲在公共汽车上扒窃钱包一个,内装人民币50元整,被失主发现后扭送当地派出所。在扭送途中,某甲乘失主不备,猛然将其推倒,夺路逃走后又被群众抓获。某甲的行为()。
近年来,某地按照“意见收集,公开听证,民主决策,执行监督,群众评议”的原则创新社区民主管理办法,让社区居民对社区事务进行全方位、全过程的参与、临督。社区民主管理办法()。①调动了居民参与社区基层政权建设的积极性②提高了居民参与政治生
视觉暂留指人眼在观察景物时,光信号传人大脑神经,需经过一段短暂的时间,光的作用结束后,视神经的反应速度会造成视觉形象并不立即消失的现象。根据上述定义,下列未利用视觉暂留现象的是:
(2008下项管)M公司小张负责组织内部的一个系统集成项目。因为组织内部的很多人对该系统及其进展感兴趣,他决定准备一份项目沟通管理计划。准备这一计划的第一步是______。
每年年终,太平洋公司都会给在职员工发放年终奖金,公司会计小任负责计算工资奖金的个人所得税并为每位员工制作工资条。按照下列要求完成工资奖金的计算以及工资条的制作:在考生文件夹下,将“Excel素材.xlsx”文件另存为“Excel.xlsx”(“.x
A、Shelikesitverymuchbecausehehasthechancetogetpromotion.B、Shelikesitbecauseworkinginabankisverynice.C、Sh
Cryingishardlyanactivityencouragedbysociety.Tears,betheyofsorrow,anger,orjoy,typicallymakeAmericansfeeluncom
最新回复
(
0
)