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
2023-07-11
51
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] 【S2】
选项
答案
O
解析
此处需要一个由限定词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/2828198.html
相关试题推荐
Itisurgedbythegovernmenttofosterasocialclimateof___________(尊师重教).sho
A______changeinpolicyisneededifrelationsareevertoimprove.A、strictB、
[originaltext]Twiceayear,alltheclocksintheUnitedStatesarechanged
Everychemicalchangeeitherresultsfromenergybeingusedtoproducethechang
Howoldis"old"?Theanswerhaschangedovertheyears.Twohundredyearsa
ClimateChangeMayMakeInsect-BorneDiseasesHardertoControl
ClimateChangeMayMakeInsect-BorneDiseasesHardertoControl
ClimateChangeMayMakeInsect-BorneDiseasesHardertoControl
ClimateChangeMayMakeInsect-BorneDiseasesHardertoControl
ClimateChangeMayMakeInsect-BorneDiseasesHardertoControl
随机试题
Thechemicalfactorywastorndown______protectingtheenvironment.A、inspiteof
Aswehaveseen,thereisnothingaboutlanguageassuchthatmakeslinguis
Forthispart,youareallowed30minutestowriteanessaybasedonthefol
某架飞机执行上海飞往北京的航班任务,备降机场选在天津,上海至北京飞行时间为1小时
A. B. C. D.
反映一个国家初次分配总收入的指标是( )。A.收入法国内生产总值 B.国民生
对于妊娠期钙、铁代谢,恰当的是A、妊娠期约需铁1g,孕妇铁储备不足,易发生缺铁性
为缩减开支,某国家通过压缩公务员队伍和调整公务员工资的办法,将公务员工资总支出缩
项目式组织的缺点包括()。A.体系复杂B.人浮于事 C.造成资源浪费
向社会公开募集股份设立股份公司的,应取得中国证监会的核准。()
最新回复
(
0
)