首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Hungry prehistoric hunters, not climate change, drove elephants to extinction during the Pleistocene era(更新世), new research sugg
Hungry prehistoric hunters, not climate change, drove elephants to extinction during the Pleistocene era(更新世), new research sugg
admin
2010-08-04
43
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【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, ff 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
【S1】
选项
答案
N
解析
此处需要一个能跟不定式词to的动词作谓语的一部分。从词库中的六个动词来看;used与to搭配,意为“过去常常”,与后一句的Today形成对比,故为答案。
转载请注明原文地址:https://kaotiyun.com/show/blA7777K
0
大学英语四级
相关试题推荐
A、Tonyshouldcontinuetakingthecourse.B、SheapprovesofTony’sdecision.C、Tonycanchooseanothersciencecourse.D、Shecan
Forthispart,youareallowed30minutestowriteacompositiononTheAdvantagesofHuntingforJobsontheInternet.Youshou
Heworkedveryhard,otherwisehe______(不可能通过)theentranceexamination.
A、Oneofherfriendswasabsentfromtheparty.B、Allherfriendstookpartnerstotheparty.C、Notallherfriendscametothe
Alandfreefromdestruction,pluswealth,naturalresources,andlaborsupply—allthesewereimportantfactorsinhelpingEngla
SchoolsacrossChinaareracingtoimplementtheEducationMinistry’sdecrees【B1】______themtorelievetheburdenfromthe【B2】_
A、Asnake.B、Arabbit.C、Abird.D、Shewasstillhesitating.D综合理解题。Tom的妈妈坚持要买特别的东西,但对话结尾也未决定买什么,还处于犹豫不决中。
A、Work.B、Play.C、Sleep.D、BothAandB.D
Mostpeoplehavenoideaofthehardworkandworrythatgointothecollectingofthosefascinatingbirdsandanimalswhichthe
A、Todepositthemoneyinabank.B、Tobuymunicipalbonds.C、Tospendashewants.D、Toinvestsomeofthem.D对话中女士谈到这个问题时,没有直截
随机试题
太阳循着亘古不变的路途正越来越大
A.α受体阻断剂B.β受体阻断剂C.α受体激动剂D.β受体激动刺E.胆碱能神经阻滞剂低血容量性休克B.感染性休克C.心源性休克D.神经源性休克E.过敏性休克
缩宫素禁用于()。
区域规划的编制程序包括()。
下列资产中,企业不能将其划分为持有至到期投资的有( )。
下列说法错误的是( )。
企业在筹资决策中,除了考虑资金成本因素外,还需要考虑的因素有()。
Itwasabusymorning,about8:30,whenanelderlygentlemaninhis80scametothehospital.Iheardhimsayingtothenurseth
某人被判处死缓,在监狱里认真改造,有立功表现,后来给他减刑,他表现得越来越好。这个过程隐含的行为塑造原理有()
在库存管理中,合理库存量应为正常时的周转库存量和(26)库存量之和。列表法是一种计算周转库存量的简单方法,周转库存量使在进货不足的情况下,仍能保证生产性消费,故其值应为进消费额中的(27)。现有某厂使用钢材在非均衡进消而全年进消相等的条件下,按表16-2预
最新回复
(
0
)