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 sug
Hungry prehistoric hunters, not climate change, drove elephants to extinction during the Pleistocene era (更新世), new research sug
admin
2012-12-26
44
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【1】to wander about the African, Eurasian, and American continents.
Today, only two【2】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,【3】vegetation and broke up habitats (栖息地), causing the death of those unable to adapt to the new conditions. Another【4】blames prehistoric humans, whose improved weapons and hunting techniques allowed them to wipe out whole herds of elephants.
To help【5】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【6】regions should match human expansion into those regions. On the contrary, if the extinction was【7】to climate change, elephants should remain in regions【8】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【9】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 refu ges【10】to humans, such as tropical forests, says Surovell.
A. uninviting B. migrated C. declined D. due
E. memorial F. specific G. already N. used
I. hypothesis J. endurance K. resolve L. polish
M. altered O. species
【9】
选项
答案
B
解析
此处应该是动词,且联系上下文可知应是过去式,作谓语。migrated out of Africa意为“迁移出非洲”。
转载请注明原文地址:https://kaotiyun.com/show/5dw7777K
0
大学英语四级
相关试题推荐
A、EverythingatStateUniversityhaschangedinthepasttenyears.B、SomethingshavechangedatStateUniversityexceptthesa
ManywithNewCollegeDegreeFindtheJobMarketHumblingTheindividualstoriesarefamiliar.Thechemistrymajortendingb
ManywithNewCollegeDegreeFindtheJobMarketHumblingTheindividualstoriesarefamiliar.Thechemistrymajortendingb
A、Dohisresearchonclosely-relatedtopics.B、Spendmoretimeinthelibrary.C、Writejustonepaperforallhisclasses.D、Dro
ImaginesendingelectronicmailtoyourfriendintheU.S.ordiscussingyourgardeningproblemwitha【B1】______inAustralia,or
Chemistrydidnotemergeasascienceuntilafterthescientificrevolutionintheseventeenthcenturyandthenonlyratherslow
Ifoursocietyeverneededareadingrenaissance(复兴),it’snow.TheNationalEndowmentfortheArtsreleased"ReadingatRisk"l
A、GotoProfessorLee’soffice.B、Gotothelibraryforsomematerials.C、FinishhisassignmentwithKate.D、HelpKatewithher
随机试题
转发上级机关和不相隶属机关的公文应当使用()
正常情况下不能通过肾小球滤过膜的物质是
新世纪新阶段人民军队的历史使命是什么?
淀粉样变性常见于
牙体缺损修复的抗力型是指
下列苏共领导人中因反对农业全盘集体化而遭到处分的是()。
如图所示,向放在水槽底部的口杯注水(流量一定),注满口杯后继续注水,直到注满水槽,水槽中水平面上升高度h与注水时间t之间的函数关系大致是()。
(2014年真题)《唐律疏议.杂律》:“诸买奴婢、马牛驼骡驴,已过价……立券之后,有旧病者三日内听悔,无病欺者市如法。”《疏议》曰:“若立券之后,有旧病,而买时不知,立券后始知者,三日内听悔。三日外无疾病,故相欺罔而欲悔者,市如法,违者笞四十;若
Whatisthewomantryingtodo?
Nowomancanbetoorichortoothin.ThissayingoftenattributedtothelateDuchessofWindsorembodiesmuchoftheoddspiri
最新回复
(
0
)