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
Humans have altered the world’s climate by (1)_____ heat-trapping gases since almost the beginning of civilization and even prev
Humans have altered the world’s climate by (1)_____ heat-trapping gases since almost the beginning of civilization and even prev
admin
2009-04-27
75
问题
Humans have altered the world’s climate by (1)_____ heat-trapping gases since almost the beginning of civilization and even prevented the start of an ice age several thousand years ago, a scientist said.
Most scientists (2)_____ a rise (3)_____ global temperatures over the past century (4)_____ to emissions of carbon dioxide (5)_____ human activities like driving cars and operating factories.
Dr. William Ruddiman, a professor at the University of Virginia, said at a meeting of the American Geophysical Union (6)_____ humans’ effect (7)_____ climate went back nearly 10, 000 years (8)_____ people gave up hunting and gathering and began farming.
In a commentary accompanying the article, Dr. Thomas J. Crowley of Duke University, said he (9)_____ Dr. Ruddiman’s premise at first. "But when I started reading, Dr. Crowley wrote, "I could not help but (10)_____ whether he just might be (11)_____ something."
The climate of the last 10,000 years has been unusually stable, (12)_____ civilization to flourish. But that is only because people chopped down swaths of forest in Europe, China and India for croplands and pastures. Carbon dioxide (13)_____ by the destruction of the forests, plus methane, another heat-trapping gas, (14)_____ by irrigated rice fields in Southeast Asia, trapped enough heat to (15)_____ an expected natural cooling.
Levels of carbon dioxide and methane rise and fall in natural cycles (16)_____ thousands of years, and both reached a peak at the end of the last ice age 11;000 years ago. Both then declined (17)_____ expected.
Both (18)_____ declining through the present day, leading to lower temperatures, and a new ice age should have begun 4,000 to 5,000 years ago, Dr. Ruddiman said. Instead, levels of carbon dioxide reversed 8,000 wears ago. The decline (19)_____ methane levels reversed 5,000 years ago, (20)_____ with the advent of irrigation rice farming.
选项
A、to
B、since when
C、as when
D、to when
答案
D
解析
使用语法。people gave up...这是个句子,所以前面应该有关联词引导,根据上下文推断,应该是when。前面有go back,go back to 意思是追溯到…,所以应该选to when。
转载请注明原文地址:https://kaotiyun.com/show/X8a4777K
0
考研英语一
相关试题推荐
[A]Lifeisamirrorofwhatyoudo[B]Thinkaboutyourfuturefamily[C]Don’tcountonanyonebutyourself[D]Think
[A]Howtoturnahobbyintoabusiness[B]Expensivetoysarenotsmartchoices[C]Smartmoneychoicesmakeafamilylif
Readthefollowingtextandanswerquestionsbyfindinginformationfromtherightcolumnthatcorrespondstoeachofthemarked
Onthesurface,Marsisthepictureofdesolation.Abarrenlandremains【C1】______forhundredsofmillionsofyears,motionless【
Thecorporateworldisincreasinglyrejectingimperialchiefexecutivesinfavourofanonymousmanagers—prudentandboringmena
ChilddevelopmentalpsychologistJeanPiagetconvincedusthatyoung,undevelopedmindscouldn’thandlecomplexconceptsbecause
Teenagersarespendingmoremoneythanever.Justlastyear,31.6millionteensspent155billion,accordingtotheNorthbrook,
Manisbornfreebutiseverywhereindebt.Intherichworld,gettingholdofyourfirstcreditcardisariteofpassagefarm
Manisbornfreebutiseverywhereindebt.Intherichworld,gettingholdofyourfirstcreditcardisariteofpassagefarm
MPsaretoinvestigatetheenvironmentalimpactofthrowaway"fastfashion"intheUKamidgrowingconcernsthatthemulti-billi
随机试题
《蚂蚁大战》的主要内容及写作特点。
下列哪项不是子宫破裂的原因
2010年7月,甲公司不服A市B区法院对其与乙公司买卖合同纠纷的判决,上诉至A市中级法院,A市中级法院经审理维持原判决。2011年3月,甲公司与丙公司合并为丁公司。之后,丁公司法律顾问在复查原甲公司的相关材料时,发现上述案件具备申请再审的法定事由。关于该案
瑕疵请求权是依赖()得以操作的。
背景资料:某施工单位承担一机电工程项目安装任务。开工之前施工单位提交了施工进度网络计划,如下图所示。在上述计划中,工作E与工作G共用一台200t履带吊车作业(其他工作不使用),E、G两工序不能同时或交叉进行施工。履带吊车到达现场后需要2d时间进行
我国金融机构市场退出有多种形式,目前金融监管当局正在酝酿采取的一种新形式是( )。
作风建设的核心是密切党同人民群众的血肉联系,要解决好()的问题。
认为“教育应当依照儿童自然发展的程序,培养儿童所固有的观察、思维和感受的能力”的教育家是()。
[*]
TheAmericanideaofrespectinghumanrightscamefromseveralsources.First,thecolonistshadbeen【36】oftheirfightsinthe
最新回复
(
0
)