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 sugg
Hungry prehistoric hunters, not climate change, drove elephants to extinction during the Pleistocene era(更新世), new research sugg
admin
2010-08-04
34
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【S1】______to wander about the African, Eurasian, and American continents. Today, only two【S2】______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,【S3】______vegetation and broke up habitats(栖息地), causing the death of those unable to adapt to the new conditions. Another【S4】______blames prehistoric humans, whose improved weapons and hunting techniques allowed them to wipe out whole herds of elephants.
To help【S5】______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【S6】______regions should match human expansion into those regions. On the contrary, ff the extinction was【S7】______to climate change, elephants should remain in regions【S8】______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【S9】______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 refuges【S10】______to humans, such as-tropical forests, says Surovell.
A)uninviting I)hypothesis
B)migrated J)endurance
C)declined K)resolve
D)due L)polish
E)mysterious M)altered
F)specific N)used
G)already O)species
H)casually
【S2】
选项
答案
O
解析
此处需要一个由限定词two修饰的复数名词作句子的主语。只有species是复数名词,且与前一句中的 kinds属于同义词,two species of elephants意为“两种大象”。
转载请注明原文地址:https://jikaoti.com/ti/v3tFFFFM
0
大学英语四级
相关试题推荐
MakeaMummyTombIntroductionAncientEgyptiansbelievedinlifeafterdeath.WealthyEgyptiansmadecarefulpreparatio
A、Checkedthemout.B、Tooknotesonthem.C、Returnedthemtotheshelves.D、Puttheminhisbook-bag.D事实题。从第三句男子连续用的三个动词“looked
Moreandmore,theoperationsofourbusinesses,governments,andfinancialinstitutionsarecontrolledbyinformationthatexis
A、Becausetheapartmentischeaperthantheothers.B、Becausethelandlordisverynicetoher.C、Becausetheequipmentinthea
Americansusuallyconsiderthemselvesafriendlypeople.Theirfriendships,however,tendtobeshorterandmore【B1】______thanf
_____(集中精力于)hisscientificresearch,hehadnotimeleftforrecreationalactivities.
Onewayofpreventingfloodsmaybebymakingrain!Thismaysoundratherstrange.Asweknow,heavyrainisthecauseofflood
A、Childrenofdivorcearealwayshappy.B、Childrenofdivorcesometimesfeelsadbutdon’treallyshowit.C、Childrenofdivorce
A、It’scheap.B、It’sfast.C、It’scomfortable.D、BothBandC.D答案在对话末尾。
A、ReasonsforPeople’sSleeping.B、FourStagesofSleep.C、Reasonsforsleepwalking.D、ASleepExperiment.B主旨题。听音前先扫视一下试卷上提供的三个
随机试题
在①干接缝(梁翼缘、板);②湿接缝(梁翼缘、板);③箱板顶宽;④腹板或梁肋中,其中梁(板)的宽度包括的部分是()。
多数国家实行的政府采购模式是()。
【背景资料】某机电安装工程项目,业主通过公开招标方式选择了某机电安装企业,双方签订了机电安装工程施工总承包合同,施工总承包企业又选择了一家劳务分包企业,将某分部工程的劳务作业分包给该劳务分包企业。在施工过程中发生如下事件。事件一:由于业
联合库存管理借助(),可使企业更加集中精力于自己的核心业务。
1.2011年7月7日,全国政法系统深化三项重点工作座谈会在北京召开。来自全国18个省(区、市)的政法委相关负责人在会上总结交流了一年多来推进三项重点工作的经验和做法。一年多来,全国各地政法机关和有关部门进一步转变观念思路、完善体制机制、强化工作
下列方法哪些是非实验的方法?()
20世纪70年代末,在农村土地经济体制改革中,在土地经营上实行()
Socialsciencehasweighedinonthe"tigermom"debate,anditlookslikeeveryoneisright:Bothover-protectiveandlaid-back
由于常对象不能被更新,因此()。
在考生文件夹下,打开文档Word2.docx,按照要求完成下列操作并以该文件名Word2.docx保存文档。在表格的底部增加一行,行标题为“学时合计”,分别计算四年理论、实践教学总学时,将计算结果填入相应单元格内;将表格中全部内容的对齐方式设置为水平居
最新回复
(
0
)