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
2023-07-16
22
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] 【2】
选项
答案
O
解析
此处需要由限定词two修饰的复数名词作句子的主语。只有species是复数名词,且与前一句中的kinds属于同义词,two species of elephants意为“两种大象”。
转载请注明原文地址:https://tihaiku.com/zcyy/2843312.html
相关试题推荐
Theconceptofstudentexchangebetweencountriesisnotanewone.Itisco
Theconceptofstudentexchangebetweencountriesisnotanewone.Itisco
Theconceptofstudentexchangebetweencountriesisnotanewone.Itisco
Theconceptofstudentexchangebetweencountriesisnotanewone.Itisco
Theconceptofstudentexchangebetweencountriesisnotanewone.Itisco
[originaltext]Throughouthistorymanhaschangedhisphysicalenvironmenti
[originaltext]Throughouthistorymanhaschangedhisphysicalenvironmenti
Itisdifficultto______theclimateofEnglandbecausethevariationsaresof
Forthispart,youareallowed30minutestowriteacompositionentitledChange
[audioFiles]audio_eufm_j21_001(20082)[/audioFiles]A、Whethertochangehisjob.
随机试题
Asubjectwhichseemstohavebeeninsufficientlystudiedbydoctorsandpsy
Themainideaofthispassageisthat______.[br]Themeaningoftheword"rej
CanBusinessBeCool?Whyagrowingnumberoff
Nextyear,ifallgoesasplanned,thelargestmakerofpersonalcomputersi
关于当今海平面上升的主要原因,国际上公认的是A.水体富营养化 B.臭氧层破坏
在影响学教过程的因素中,学生的先前基础知识、学习方式、智力水平、兴趣和需要差异等
公司公开发行新股,要求最近(?)年财务会计文件无虚假记载,无其他重大违法行为。A
共用题干 GlobalWarmingFewpeoplenowquest
Thechangeinthatvillagewasmiraculou
东莨菪碱不适用于A.麻醉前给药B.抗震颤麻痹C.防晕D.重症肌无力E.妊娠呕吐
最新回复
(
0
)