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
69
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] 【S9】
选项
答案
B
解析
此处应该是动词,而且是过去式,作谓语。migrated out of Africa意为“迁移出非洲”。
转载请注明原文地址:http://tihaiku.com/zcyy/3444471.html
相关试题推荐
His______changeveryquickly;onemomenthe’scheerful,andthenexthe’scompl
[originaltext]Chequeshavelargelyreplacedmoneyasameansofexchange,f
[originaltext]Chequeshavelargelyreplacedmoneyasameansofexchange,f
[originaltext]TheclimateofthewestcoastisthemostmoderateinCanada.
Greatchangeshavetakenplaceinthemountainvillage,anditsappearanceis__
Recently,theUnitedNationsscientificpanelstudyingclimatechangedeclar
Recently,theUnitedNationsscientificpanelstudyingclimatechangedeclar
Change--ortheabilityto______(使自己适应变化中的环境)--isessentialtoevolution.adapt
QuickChangeinStrategyforaBooksellerInthemovieY
QuickChangeinStrategyforaBooksellerInthemovieY
随机试题
Businessandgovernmentleadersalsoconsidertheinflationratetobeanim
Infuturetradethekeydevelopmenttowatchistherelationshipbetweenthe
Itisquitenecessaryforhim______hisresponsibilitiesconstantly.A、toberem
Electricitywasbornatthedawnofthelastcentury.Fromthenon,househol
宫崎骏,是日本动画界的一个传奇,是第一位将动画上升到人文高度的思想者。他的作品《
亚慢性毒性试验观察指标不包括()A.食物利用率 B.脏器系数 C.血生化
利用共用部位、共用设施设备进行经营获得的收益,应当主要用于(),也可以按照业主
2009年12月召开的中央经济工作会议提出,2010年经济工作的总体要求是:全面
共用题干 一般资料:求助者,女性,28岁,公司职员。案例介绍:求助者是独生女,
下列发电厂电力网络计算机监控系统配置符合规程的是()。A.电力网络计算机监控系
最新回复
(
0
)