首页
登录
职称英语
Hungry prehistoric hunters, not climate change, drove elephants to extinctio
Hungry prehistoric hunters, not climate change, drove elephants to extinctio
游客
2023-06-24
23
管理
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 [br] 【C3】
选项
答案
M
解析
此处需要及物动词的过去式,后跟宾语vegetation,与and后面的broke up habitats并列作谓语部分。根据上文所说“气候急剧变化”,可知altered正确。altered vegetation意为“改变植被”。
转载请注明原文地址:https://tihaiku.com/zcyy/2779112.html
相关试题推荐
[originaltext]Overtheyears,newtechnologieshavechangedfarming.Change
[originaltext]Overtheyears,newtechnologieshavechangedfarming.Change
[originaltext]PresidentBushspokeonthefirstanniversaryofthechangeo
[originaltext]M:Speakingofthesubjectoftoday,(12)whatchangeshaveyousee
BeingObjectiveonClimateChange[A]Lastweek,CraigRucke
BeingObjectiveonClimateChange[A]Lastweek,CraigRucke
BeingObjectiveonClimateChange[A]Lastweek,CraigRucke
BeingObjectiveonClimateChange[A]Lastweek,CraigRucke
BeingObjectiveonClimateChange[A]Lastweek,CraigRucke
BeingObjectiveonClimateChange[A]Lastweek,CraigRucke
随机试题
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecaus
[originaltext] Howdoyouknowsportattheinternationallevel?(16)1amalwa
Completetheformbelow.WriteNOMORETHANTWOWORDSAND/ORANUMBERforeacha
Alltheinformationwehavecollectedinrelationtothatease______verylittl
比较运算符用以对两个数值进行比较,产生的结果为逻辑值TRUE或FALSE。比较运
声测法埋四根管也属双孔检测()。
竣工(预)验收准备:(三)竣工(预)验收组组长由各级建设管理单位(部门)担任,成
皮亚杰的感知运动阶段是指() A.0~2岁8.2~7岁C.7~11
股东仅对股东大会多项议案中某项或某几项议案进行网络投票的,视为出席本次股东大会
首席风险官应当向公司住所地中国证券监督管理委员会派出机构提交()A.周度工作报
最新回复
(
0
)