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
When global warming finally came, it stuck with a vengeance(异乎寻常地). In some regions, temperatures rose several degrees in less t
When global warming finally came, it stuck with a vengeance(异乎寻常地). In some regions, temperatures rose several degrees in less t
admin
2018-08-25
52
问题
When global warming finally came, it stuck with a vengeance(异乎寻常地). In some regions, temperatures rose several degrees in less than a century. Sea levels shot up nearly 400 feet, flooding coastal settlements and forcing people to migrate inland. Deserts spread throughout the world as vegetation shifted drastically in North America, Europe and Asia. After driving many of the animals around them to near extinction, people were forced to abandon their old way of life for a radically new survival strategy that resulted in widespread starvation and disease. The adaptation was farming: the global-warming crisis that gave rise to it happened more than 10,000 years ago.
As environmentalists convene in Rio de Janeiro this week to ponder the global climate of the future, earth scientists are in the midst of a revolution in understanding how climate has changed in the past—and how those changes have transformed human existence. Researchers have begun to piece together an illuminating picture of the powerful geological and astronomical forces that have combined to change the planet’s environment from hot to cold, wet to dry and back again over a time period stretching back hundreds of millions of years.
Most important, scientists are beginning to realize that the climatic changes have had a major impact on the evolution of the human species. New research now suggests that climate shifts have played a key role in nearly every significant turning point in human evolution: from the dawn of primates(灵长目动物)some 65 million years ago to human ancestors rising up to walk on two legs, from the huge expansion of the human brain to the rise of agriculture. Indeed, the human history has not been merely touched by global climate change, some scientists argue, it has in some instances been driven by it.
The new research has profound implications for the environmental summit in Rio. Among other things, the findings demonstrate that dramatic climate change is nothing new for planet Earth. The benign(宜人的)global environment that has existed over the past 10,000 years—during which agriculture, writing, cities and most other features of civilization appeared—is a mere bright spot in a much larger pattern of widely varying climate over the ages. In fact, the pattern of climate change in the past reveals that Earth’s climate will almost certainly go through dramatic changes in the future— even without the influence of human activity.
Earth scientists have come to understand that climate _____.
选项
A、is going through a fundamental change
B、has been getting warmer for 10,000 years
C、will eventually change from hot to cold
D、has gone through periodical changes
答案
D
解析
文章第2段第2句提到“研究者已经开始综合出一幅有关强大的地质和天文力量发生作用的说明性的图片,在过去的几百万年中,这两种力量结合在一起改变着地球的环境:从炎热到寒冷,从潮湿到干燥,如此反复,循环不止”,D与文章的意思一致,因而正确。
转载请注明原文地址:https://kaotiyun.com/show/FQH7777K
0
大学英语六级
相关试题推荐
Tofindoutwhattheweatherisgoingtobe,mostpeople【B1】______theradio,television,ornewspapertogetanexpertweatherf
A、Afamilywithhighereducation.B、Anunmarriedcollegegraduate.C、Alawyerknownfarandwide.D、Afamilywithloweducation.
A、Heoftenborrowsmoneyfromothers.B、Hehasjustreceivedhismonthlypay.C、Hecan’tpayoffhiscreditcards.D、Hehaskept
Thehumancriterionforperfectvisionis20/20forreadingthestandardlinesonaSnelleneyechartwithoutahitch.Thescore
Thehumancriterionforperfectvisionis20/20forreadingthestandardlinesonaSnelleneyechartwithoutahitch.Thescore
TheMysteryoftheNazcaLines[A]IfyouvisitthePeruviancoastaldesertfromnorthtosouth,youwillnotethatsporadica
Lackofsleepmakesyougainweightandraisesyourriskforheartdiseaseanddiabetes,apartfromresultingin【C1】______vision
Manycountrieshaveaholidaytocelebrateworkers’rightsonoraroundMay1,butLabourDayinCanadaiscelebratedonthefir
Manycountrieshaveaholidaytocelebrateworkers’rightsonoraroundMay1,butLabourDayinCanadaiscelebratedonthefir
A、LakeTulainyo.B、MojaveDesert.C、DeathValley.D、TheSaltonSea.C细节题。根据第三段soisthelowestpoint(includingAlaska).MountWhi
随机试题
在小学生概念的掌握过程中起重要作用的是()。
溶血性链球菌感染最常导致
吴某承租姚某一套住房,租期为3年,每半年结算一次租金,双方签订了书面合同,各执一份。后因姚某要去国外工作并将在国外定居,便将该房卖给刘某,并办理了交易手续,但未能及时通知吴某。刘某买了此房后又在外地出差。半年之后,刘某以房主的身份向吴某收取房租,吴某拒绝向
规划报告编写完成以后,要履行(),形成一个规范性文件。
《中华人民共和国基本农田保护条例》中所称基本农田,是指按照一定时期人口和社会经济发展对农产品的需求,依据()确定的不得占用的耕地。
关于人工挖孑L桩安全控制要点的说法,正确的是()。
将学习过的知识分门别类,并列出提纲,属于()。
机关之间可用于上行、下行、平行的文种是()。
有的公园规定:禁止攀枝摘花。此规定从法学的角度看,也可以解释为:不允许无故毁损整株花木。这一解释属于下列哪一项?()
预定义技术的主要通信工具是定义报告。报告形式有多种,下列()可以表明外部实体、过程和文件间的数据流动。
最新回复
(
0
)