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
2024-02-17
19
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【1】to wander about the African, Eurasian, and American continents.
Today, only two【2】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,【3】vegetation and broke up habitats (栖息地), causing the death of those unable to adapt to the new conditions. Another【4】blames prehistoric humans, whose improved weapons and hunting techniques allowed them to wipe out whole herds of elephants.
To help【5】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【6】regions should match human expansion into those regions. On the contrary, if the extinction was【7】to climate change, elephants should remain in regions【8】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【9】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 refu ges【10】to humans, such as tropical forests, says Surovell.
A. uninviting B. migrated C. declined D. due
E. memorial F. specific G. already N. used
I. hypothesis J. endurance K. resolve L. polish
M. altered O. species [br] 【1】
选项
答案
N
解析
此处需要能跟不定式词to的动词作谓语的一部分。从词库中的六个动词来看,used与to搭配,意为“过去常常”,与后一句的Today形成对比,故为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3459575.html
相关试题推荐
[originaltext]W:Mr.Glieberman,doyouseeanychangeinthehighrateofbrok
[originaltext]M:So,whatexactlyareyoudoingtoprotecttheelephantshere?
[originaltext]M:So,whatexactlyareyoudoingtoprotecttheelephantshere?
[originaltext]Manychangesaretakingplaceinthewayinwhichmenandwom
[originaltext]Manychangesaretakingplaceinthewayinwhichmenandwom
TheWorldinaGlass:SixDrinksThatChangedHistoryTomStanda
TheWorldinaGlass:SixDrinksThatChangedHistoryTomStanda
TheWorldinaGlass:SixDrinksThatChangedHistoryTomStanda
TheWorldinaGlass:SixDrinksThatChangedHistoryTomStanda
TheWorldinaGlass:SixDrinksThatChangedHistoryTomStanda
随机试题
Whichofthefollowingismostlikelytheplacethemanvisits?[br][originalt
古文明ancientcivilization
A、Youmayhavefunmakingbarbecuesinthegarden.B、Youwon’tfeelstuckandla
Speaktohimslowly______hemayunderstandyoubetter.A、sinceB、sothatC、forD、
甲有限责任公司根据其与外商签订的投资合同,外商将分两次投入外币资本,投资合同约定
A级洁净工作区中,≥5μm动态悬浮粒子最大允许数为A.5个/米3 B.4个/米
不能进行气体交换的是( )。A.终末细支气管 B.呼吸性细支气管 C.肺泡
根据原文内容,不可推知的一项是: A人们对食品添加剂的安全存在疑问 B现
依次填入下列句子横线处的词语,最恰当的一组是: 锦鲤俗称日本鲤鱼,是很多养鱼爱
就境内持仓分析来说,按照规定,国境期货交易所的任何合约的持仓数量达到一定数量时,
最新回复
(
0
)