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
Hungry prehistoric hunters, not climate change, drove elephants to extinction during the Pleistocene era (更新世), new research sug
Hungry prehistoric hunters, not climate change, drove elephants to extinction during the Pleistocene era (更新世), new research sug
admin
2012-12-26
55
问题
Hungry prehistoric hunters, not climate change, drove elephants to extinction during the Pleistocene era (更新世), new research suggests.
At least 12 kinds of elephants【1】to wander about the African, Eurasian, and American continents.
Today, only two【2】of elephants are left in South Asia and Africa. One theory for this dramatic death holds that rapid climate shifts at the end of the most recent major ice age, some 10,000 years ago,【3】vegetation and broke up habitats (栖息地), causing the death of those unable to adapt to the new conditions. Another【4】blames prehistoric humans, whose improved weapons and hunting techniques allowed them to wipe out whole herds of elephants.
To help【5】the debate, archaeologist Todd Surovell of the University of Wyoming, and colleagues tested two assumptions. If humans caused the elephant extinction, Surovell reasoned, the timing of the die-off in【6】regions should match human expansion into those regions. On the contrary, if the extinction was【7】to climate change, elephants should remain in regions【8】colonized by humans and would only begin to die off once climate change occurred.
The team tested both theories by analyzing where and when elephants were killed. In all, the study included 41 archaeological sites on five continents. The researchers found that, as humans【9】out of Africa, they left a trail of dead elephants behind them. The creatures disappear from the fossil record of a region once it became colonized by humans. Modern elephants survived in refu ges【10】to humans, such as tropical forests, says Surovell.
A. uninviting B. migrated C. declined D. due
E. memorial F. specific G. already N. used
I. hypothesis J. endurance K. resolve L. polish
M. altered O. species
【6】
选项
答案
F
解析
此处需要形容词作定语,修饰名词regions。根据下文的those regions,specific一词合适,即specific regions(定地区)。
转载请注明原文地址:https://kaotiyun.com/show/rdw7777K
0
大学英语四级
相关试题推荐
A、Todosomeresearch.B、Tosupporthisfamily.C、Topayforhiscollegeeducation.D、Tohelphispartnerexpandbusiness.C选项均以
A、Itwon’tbeanydifferentfromtheothers.B、Itwillbeunusuallymild.C、Itwon’taffectthehunters.D、Itwillprobablybec
ManywithNewCollegeDegreeFindtheJobMarketHumblingTheindividualstoriesarefamiliar.Thechemistrymajortendingb
ImaginesendingelectronicmailtoyourfriendintheU.S.ordiscussingyourgardeningproblemwitha【B1】______inAustralia,or
ImaginesendingelectronicmailtoyourfriendintheU.S.ordiscussingyourgardeningproblemwitha【B1】______inAustralia,or
A、Itisbeingforcedoutoftheentertainmentindustry.B、Itshouldchangeitsconceptofoperation.C、Itshouldrevolutionizei
A、Becausethedemandforfoodincreased.B、Becausebadweathercausedthethreatoffoodshortage.C、Becausetheproductionoff
随机试题
A.按给药途径分类B.按分散体系分类C.按制法分类D.按形态分类E.按药物种类分类利用物理化学等理论对有关问题进行研究的分类方法
A、胰头癌B、急性胆囊炎C、胆总管结石D、急性胰腺炎E、壶腹部癌黄疸开始有波动,以后加深并伴大便潜血阳性_______。
温热药的作用有
下列属于无排卵性功血特点的有()
目前,在Internet网上提供的主要应用功能有电子邮件、万维网、远程登录和()等。
期货从业人员在执业过程中应当以适当的技能,以小心谨慎、勤勉尽责和独立客观的态度为投资者提供服务,维护()的合法权益。
下列选项中,关于资本项目个人外汇管理的表述,正确的包括()。
企业联盟的主要形式是()。
下列事项中,应确认为预计负债的有()。
衡量劳动定额水平的方法包括()。
最新回复
(
0
)