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
2024-01-26
28
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【C1】______to wander about the African, Eurasian, and American continents. Today, only two【C2】______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,【C3】______vegetation and broke up habitats (栖息地), causing the death of those unable to adapt to the new conditions. Another【C4】______blames prehistoric humans, whose improved weapons and hunting techniques allowed them to wipe out whole herds of elephants.
To help【C5】______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【C6】______regions should match human expansion into those regions. On the contrary, if the extinction was【C7】______to climate change, elephants should remain in regions【C8】______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【C9】______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 rerfuges【C10】______to humans, such as tropical forests, says Surovell.
A. uninviting B. migrated C. declined D. due
E. memorial F. specific G. already H. casually
I. hypothesis J. endurance K. resolve L. polish
M. altered N. used O. species [br] 【C2】
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/3395377.html
相关试题推荐
FromAccountanttoYogi:MakingaRadicalCareerChange[A]Atsomepoint,a
FromAccountanttoYogi:MakingaRadicalCareerChange[A]Atsomepoint,a
FromAccountanttoYogi:MakingaRadicalCareerChange[A]Atsomepoint,a
FromAccountanttoYogi:MakingaRadicalCareerChange[A]Atsomepoint,a
FromAccountanttoYogi:MakingaRadicalCareerChange[A]Atsomepoint,a
FromAccountanttoYogi:MakingaRadicalCareerChange[A]Atsomepoint,a
TheChangesFacingFastFoodA)Fast-foodfirmshavetob
TheChangesFacingFastFoodA)Fast-foodfirmshavetob
TheChangesFacingFastFoodA)Fast-foodfirmshavetob
TheChangesFacingFastFoodA)Fast-foodfirmshavetob
随机试题
Look!The________upatthelake________justbreathtaking.A、sceneries;areB、scen
()冰激凌()枣子[br]()色拉油()煎蛋E、D
[originaltext]Andnow,ifyou’llwalkthisway,ladiesandgentlemen,then
ThoughtheworkofcelebratedartistEugeneDelacroix(i)______accoladesfrombo
醉林和马刀树是哪种不良地质现象的标志? A.崩塌B.滑坡C.倒石堆D.泥
横断面皮部呈红棕色,有数处向内嵌入,木部黄白色,有细孔(导管),射线红棕色、放射
存量房房源按产权状态可以分为()。A:已购公房 B:军产房 C:再次交易的
(2017年真题)频繁应用可引起局部组织萎缩的药物是( )A.西地碘含片 B
不属于苯二氮革类药物作用特点的是A.具有抗焦虑作用 B.具有外周性肌松作用
G公司拟新建一条生产线,经调研和预算,该生产线的经济寿命为10年,新建厂房投资额
最新回复
(
0
)