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
47
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://www.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
Theproblemofhowhealth-careresourcesshouldbeallocatedorapportioned,
设A,B是n阶方阵,下列命题正确的是().A.若A,B都是可逆阵,则A+B也
准静态过程中,系统经历的所有状态都接近于()。A.相邻状态 B.初状态
忠于教育事业的集中体现和履行师德要求的前提是()。A.敬业乐教,强化责任
欧洲债券票面所使用的货币一般是可自由兑换的货币,主要为( )A.英镑 B.欧
某变电站在2016年完成了该站的精益化评价工作,则下一次评价时间最迟为()年前。
建设管理单位(部门)在()向运检单位移交专用工器具和备品备件。验收后$;
机构汽车贷款,是指贷款人对除()以外的法人、其他经济组织发放的用于购买汽车的贷
2009年,中国银行业协会印发《中国银行业金融机构企业社会责任指引》,从()方
隧道浅埋段施工严禁采用的方法是()。A、单侧壁导坑法 B、双侧壁导坑法
最新回复
(
0
)