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 su
Hungry prehistoric hunters, not climate change, drove elephants to extinction during the Pleistocene era (更新世), new research su
admin
2010-04-12
78
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 his 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 whet1 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. Modem elephants survived in refuges【S10】______to humans, such as tropical forests, says Surovell.
A) uninviting B) migrated C) used D) due
E) mysterious F) specific G) already H) casually
I) hypothesis J) endurance K) resolve L) polish
M) altered N) declined O) species
【S4】
选项
答案
I
解析
此处应该是可数名词单数,做主语。hypothesis是可数名词单数。another hypothesis与前句中的主语one theory形成并列关系。
转载请注明原文地址:https://kaotiyun.com/show/Xmj7777K
0
大学英语四级
相关试题推荐
Rabbitearantennasareoldfashionedbutarestillinuse.Emersondevelopedatechniquethatgreatlyimprovedtheantenna’s_
WhichwordinthefirstparagraphdescribestheidealhomeformostAmericans?Popularityofrusticfurniturein1980sandplai
ThepassagegivesadescriptionofthecontaminationinNewOrleansafterHurricaneKatrina.Todate,sixpeoplehavediedfrom
AlthoughNewOrleanshasbeenapartoftheUnitedStatesforalmosttwocenturies,itspopulation______(对…感到自豪)itsFrenchhe
A、K10-15.B、K20-24.C、E10-12.D、F1-3.BWhatarethefamily’sseatnumbers?此题考查听特定信息的能力,解题关键是要听到SeatnumbersK20-24,考生还应注意数字辨音的速
AbattlehasbeengoingonoverwhogovernstheInternet,withAmericademandingtomaintainakeyroleinthenetworkithelped
A、Peoplemayuseportablelaptopcomputerstolistentomusic.B、Peoplemaysetthemathighvolumewhentheylistentomusic.C
1.Manystudentsfeltthatitwashardtofindasatisfactoryjob,because______.2.Tosolvethisproblem,universitieshavea
A、Becauseitisn’tclosed.B、Becausethestudentshavetopassallexaminationsbeforeenteringit.C、Becausethereisnoexamin
Thetermbiologicalclockisappliedtothemeans,whichlivingthings【M1】______adjusttheiractivitypatterns,withou
随机试题
下列哪项是肺阴虚证与燥邪犯肺证的主要区别()
在按份之债中,()。
关于沥青路面弯沉值评定,以下说法正确的是()。
在工资项目设置中,设置工资项目“其他补贴”为条件公式。条件公式名称为“三八妇女节过节费”,默认值“0”条件项目:【内容】 【金额】性别=女100
U会计师事务所接受委托对X公司20×4年度财务报表及其相关内部控制有效性进行整合审计。A注册会计师接受指派担任项目合伙人。审计工作底稿中记载的有关X公司内部控制设计和运行的部分内容摘录如下:(1)X公司货币资金支付管理办法规定,单笔付款金额在50
下列声称属于营养素功能声称的是()。
课程标准作为衡量教育质量的基本依据,其核心部分是()。
以下句子中关联词使用不正确的是()。
某国有企业在经营期间有偷漏税款行为,被某区国家税务局查获,某区国家税务局对该企业作出决定,责令其3日内补交偷漏税款,如逾期不补将另行作出罚款决定。该企业对某区国家税务局的上述具体行政行为不服。下列选项正确的是()。
CultureShockPeoplehavedifficultyin【T1】toanewculturecompletely【T1】______differentfromtheirown.I.Thephasesof
最新回复
(
0
)