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
59
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
Whatisthepatientsufferingfrom?[originaltext]M:Ifyou’lljusthaveaseat,
[originaltext]M:Theticketstotonight’sshowingare$5foradultsandhalfth
ThespaceageofficiallybeganonOctober4,1957,【C1】______theSovietUnion
混凝土搅拌机按安装形式分为( )。A.周期式、连续式 B.自落式、强制式 C
生理性体重下降的范围一般是出生体重的()A.15%~20% B.10
女,58岁。绝经后出现阴道少量流血1个月。妇科检查见宫口脱出红色肿物,直径约4.
为了进一步验证研究结论的(),应通过交叉检验等方法进行进一步抽样调查分析。A:
A.排便时无痛,排便终末时粪便沾有鲜血,并有粉红色球形肿块脱出 B.排便时有少
简述现代企业人力资源管理各个历史发展阶段的特点。
某电气线路正常工作电流为10A,线路上1s的发热量为1J,即线路上功率损耗为1W
最新回复
(
0
)