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
2023-07-28
32
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【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 his 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, if 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 whet1 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. Modem elephants survived in refuges【S10】______to humans, such as tropical forests, says Surovell.
A) uninviting B) migrated C) used D) due
E) mysterious F) specific G) already H) casually
I) hypothesis J) endurance K) resolve L) polish
M) altered N) declined O) species [br] 【S3】
选项
答案
M
解析
根据上文所说“气候急剧变化”,可知altered正确,意指“改变植被”。
转载请注明原文地址:https://tihaiku.com/zcyy/2876940.html
相关试题推荐
Throughouthistorymanhaschangedhisphysicalenvironmentinordertoimprove
Throughouthistorymanhaschangedhisphysicalenvironmentinordertoimprove
Ihavecertainlyseenlotsofchangesinmylifetime!Ilookaroundmyhomeand
Ihavecertainlyseenlotsofchangesinmylifetime!Ilookaroundmyhomeand
[originaltext]Therehavebeenmanygreatinventions,thingsthatchangethe
[originaltext]Therehavebeenmanygreatinventions,thingsthatchangethe
[originaltext]Beingbilingualproduceschangesintheanatomyofthebrain,
[originaltext]Beingbilingualproduceschangesintheanatomyofthebrain,
[originaltext]Beingbilingualproduceschangesintheanatomyofthebrain,
[originaltext]Beingbilingualproduceschangesintheanatomyofthebrain,
随机试题
[originaltext]W:NewOrleansisallaboutattitude.Fromitsmusictoitsstree
[originaltext]Investigatorsyesterdayweretryingtodeterminethesourceof
Inthesentence"Shefinallydecidestojointheparty",therelationshipbetwee
Whenwillthenewpricetakeeffect?On______.[br]What’sthepurposeof
Outputisnowsixtimes______itwasbeforeliberation.A、thatB、whichC、whatD、as
在水利水电工程施工过程中有潜在能量和物质释放危险的、可造成人员伤亡、健康损害、财
我国古建工程常用的汉白玉石材在下列主要产地中哪一个是错的?()A.湖北黄石
根据《建设工程安全生产管理条例》,施工单位对列入工程概算的安全作业环境及安全施工
基于BIM技术的成本预算软件是属于()。A.基础软件 B.核心建模软件 C.
永续年金由于是一种没有到期日的年金,因此只能计算现值不能计算终值。()
最新回复
(
0
)