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
63
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 wondering
B、to be wondering
C、wonder
D、wondering
答案
C
解析
词法辨析。can’t help but不得不…,后面一般接不带to的动词不定式。
转载请注明原文地址:https://kaotiyun.com/show/T8a4777K
0
考研英语一
相关试题推荐
Foralmosttwocenturiesnow,scientistshavenoticedaplace’ssuicideratebearstroublinglinkstothechangingoftheseason
[A]Takeawalk[B]Lookatcurrenttrends[C]Brainstormwithfriends[D]ShareyouropinionsontheInternet[E]L
GivenalltheroilingdebatesabouthowAmerica’schildrenshouldbetaught,itmaycomeasasurprisetolearnthatstudentssp
[A]Howtoturnahobbyintoabusiness[B]Expensivetoysarenotsmartchoices[C]Smartmoneychoicesmakeafamilylif
Readthefollowingtextandanswerquestionsbyfindinginformationfromtherightcolumnthatcorrespondstoeachofthemarked
Onthesurface,Marsisthepictureofdesolation.Abarrenlandremains【C1】______forhundredsofmillionsofyears,motionless【
Thecorporateworldisincreasinglyrejectingimperialchiefexecutivesinfavourofanonymousmanagers—prudentandboringmena
Sciencehasfewmorecontroversialtopicsthanhumanintelligence—inparticular,whethervariationsinitarearesultofnature
Whyinanageofadvancedtechnology,shouldsomanypeoplestillclingtoanancientbelief?Inpartitmustbebecauseastrolo
MPsaretoinvestigatetheenvironmentalimpactofthrowaway"fastfashion"intheUKamidgrowingconcernsthatthemulti-billi
随机试题
具有镇痛作用的低频脉冲电疗法为
每公顷被征用耕地的安置补助费,最高不得超过被征用前3年平均年产值的()。
(2010年考试真题)保荐人应自持续督导工作结束后()个工作日内向证券交易所报送“保荐总结报告书”。
不同的资本主义国家,市场经济的具体模式却是完全相同的。()
历史题材作品妇孺皆悦、老少咸宜,自古以来为民众________。其优势在于能提供给观众和读者以民族认同、文化认同,其故事和人物往往深深根植于民族精神传统,犹如________的大树,每片叶子的纹理都向你诉说一种由来。在中国,文艺创作既受历史滋养,反过来,与
在计算机网络中,用户访问网络的界面是______。
程序设计方法要求在程序设计过程中
设有定义:doublea,b,c;若要求通过输入分别给a、b、c输入1、2、3,输入形式如下(注:此处□代表一个空格)□□1.0□□2.0□□3.0则能进行正确输入的语句是()。
A、Wecanlearnhowbadpersonsimprovethemselves.B、Wecanlearnhowtogetalongwithotherpeople.C、Wecanunderstandlifea
ProfessorJohnsonissaidtohavemadesome______advanceinhisresearchinthepastyear.
最新回复
(
0
)