首页
登录
职称英语
Hungry prehistoric bunters, not climate change, drove elephants to extinctio
Hungry prehistoric bunters, not climate change, drove elephants to extinctio
游客
2024-02-12
40
管理
问题
Hungry prehistoric bunters, 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 this 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 when 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. Modern elephants survived in refuges【S10】______to humans, such as tropical forests, says Surovell.
A)uninviting I)hypothesis
B)migrated J)endurance
C)declined K)resolve
D)due L)polish
E)mysterious M)altered
F)specific N)used
G)already O)species
H)casually [br] 【S4】
选项
答案
I
解析
此处应该是可数名词单数,作主语。hypothesis是可数名词单数,而且another hypothesis与前一句中的主语one theory形成并列关系,与下一段的第一句中tested two assumptions(检验了两种假说)前后照应。
转载请注明原文地址:https://tihaiku.com/zcyy/3444466.html
相关试题推荐
OnCulturalExchange1.如今,各国之间的文化交流越来越频繁2.有人支持,有人质疑3.我的看法
His______changeveryquickly;onemomenthe’scheerful,andthenexthe’scompl
[originaltext]Chequeshavelargelyreplacedmoneyasameansofexchange,f
[originaltext]Chequeshavelargelyreplacedmoneyasameansofexchange,f
[originaltext]TheclimateofthewestcoastisthemostmoderateinCanada.
[originaltext]TheclimateofthewestcoastisthemostmoderateinCanada.
Greatchangeshavetakenplaceinthemountainvillage,anditsappearanceis__
Recently,theUnitedNationsscientificpanelstudyingclimatechangedeclar
Change--ortheabilityto______(使自己适应变化中的环境)--isessentialtoevolution.adapt
QuickChangeinStrategyforaBooksellerInthemovieY
随机试题
Swedishscientistscenteredtheresearchon85peoplewhoownbordercolliesor
Whydowefailtoattendtoourfamilyfinancialwell-being?[br]Thedisability
为保证房地产价格指数的科学性和可靠性,下列说法中正确的是( )。A.选择大的房
绵马贯众药材有驱虫与抗肿瘤作用的化学成分是A:生物碱类化合物B:间苯三酚类化合
下列各项,不能放在一般药斗内的是A.胆南星 B.川贝母 C.灯心草 D.制
岗位分级与岗位分类在具体实施上存在差别,表现在()。A.岗位分类适用于国家各级
强式有效市场假设认为,当前的股票价格已经充分反映了与公司前景有关的全部公开信息。
有限责任公司董事、高级管理人员执行公司职务时因违法给公司造成损失的,在一定情形下
房地产开发企业取得土地使用权用于建造对外出售的商品房的,土地使用权应确认为无形资
银行承兑汇票的承兑银行,应当按照票面金额向出票人收取()的手续费。A:千分之一
最新回复
(
0
)