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
2020-02-21
22
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【C1】______to wander about the African, Eurasian, and American continents. Today, only two【C2】______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,【C3】______vegetation and broke up habitats (栖息地), causing the death of those unable to adapt to the new conditions. Another【C4】______blames prehistoric humans, whose improved weapons and hunting techniques allowed them to wipe out whole herds of elephants.
To help【C5】______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【C6】______regions should match human expansion into those regions. On the contrary, if the extinction was【C7】______to climate change, elephants should remain in regions【C8】______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【C9】______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 rerfuges【C10】______to humans, such as tropical forests, says Surovell.
A. uninviting B. migrated C. declined D. due
E. memorial F. specific G. already H. casually
I. hypothesis J. endurance K. resolve L. polish
M. altered N. used O. species
【C8】
选项
答案
G
解析
此处应该是状语成分,由副词充当。从上下文语义的逻辑性看,只有already合适。
转载请注明原文地址:https://jikaoti.com/ti/JC0FFFFM
0
大学英语四级
相关试题推荐
Duringthe1992presidentialcampaign,HillaryRodhamClintonobserved,"Ourlivesareamixtureofdifferentroles.Mostofus
Theriseofmultinationalcorporations(跨国公司),globalmarketing,newcommunicationstechnologies,andshrinkingculturaldiffere
Asmedicalevidencemountsthatweareindeedwhatweeat,consumingahealthierdiethasbecomealmostanationalpassioninth
Asmedicalevidencemountsthatweareindeedwhatweeat,consumingahealthierdiethasbecomealmostanationalpassioninth
Nearly5,000peoplebelowtheageof21diebecauseofexcessivealcoholconsumptioneachyear.Oddly,thishastriggeredanew
A"memorypill"thatcouldaidexamrevisionandhelptopreventpeopleforgettingimportantanniversariesmaysoonbeavailable
I’musuallyfairlyskepticalaboutanyresearchthatconcludesthatpeopleareeitherhappierorunhappierormoreorlesscerta
A、Oceancurrents.B、Climatedisorder.C、Humanbeing.D、Naturaldisasters.C原文中有一处自问自答:“怨谁?科学家认为99%动植物面临灭绝的危险是因为人类活动。”故选C。
随机试题
ZB型轴向柱塞泵是一种可逆转的液压元件,它既可作为油泵,又可作为油马达。
链激酶属于
A.公开、公平、公正原则B.便民和效率原则C.信赖保护原则D.法定原则设定和实施行政许可,应当依照法定的权限、范围、条件和程序,体现了设定和实施行政许可的
某一级公路设计行车速度V=100km/h,双向六车道,汽车荷载采用公路一I级。其公路上有一座计算跨径为40m的预应力混凝土箱形简支梁桥。采用上、下双幅分离式横断面行驶。混凝土强度等级为C50。横断面布置如图7-2所示。提示:按《公路桥涵设计通用
从经济增长率与工资增长率的相对关系中说明结构性通货膨胀的发生机制。
A公司将原采用公允价值模式计价的一幢出租用办公楼收回,作为企业的自用房地产处理。在出租收回前,该投资性房地产的成本和公允价值变动明细科目分别为1000万元和200万元(贷方)。转换当日该厂房的公允价值为900万元。则该资产在转换日影响损益的金额为(
材料与工艺的应用有以下几种表现手段______、______、______。
对结构主义教育进行评述。
下列关于栈的描述正确的是()。
A、Bytheirfunction.B、Bytheirproperties.C、Byincreaseofourexperience.D、Byassociationwithotherthings.C[听力原文]Howdo
最新回复
(
0
)