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
86
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
【S9】
选项
答案
B
解析
此处应该是动词,而且是过去式,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/dqA7777K
0
大学英语四级
相关试题推荐
MakeaMummyTombIntroductionAncientEgyptiansbelievedinlifeafterdeath.WealthyEgyptiansmadecarefulpreparatio
Kuwaitisacountrywhichisquitesmall,butwhichisquiterich.Ithasapopulationofalittlemorethanamillion,anditi
Itishardlynecessaryformetocitealltheevidenceofthedepressingstateofliteracy(读写能力).ThesefiguresfromtheDepartm
Thesweetconfectionknownaschocolateisconsumedtothedelightofmillionsworld-wideeveryday.Fewofthosesweet-toothed
SchoolsacrossChinaareracingtoimplementtheEducationMinistry’sdecrees【B1】______themtorelievetheburdenfromthe【B2】_
WhatCausesCancer?Thequestion"Whatcausescancer?"hasbeenaskedforcenturies.Theshortansweris:westilldon’tkno
Americansusuallyconsiderthemselvesafriendlypeople.Theirfriendships,however,tendtobeshorterandmore【B1】______thanf
A、Nowsocietyismoredifficultforpeopletogetonwithunmarriedcouplesthananytimebefore.B、Nowsocietyfindsitsunders
A、Justfiveminutes.B、Slightlylessthananhour.C、Betweenoneandtwohours.D、Alittlemorethantwohours.B
FittobePresidentAreyoufittobePresidentoftheUnitedStates?Physicalfitnessisnotarequirement,butitcouldbe
随机试题
对被撤销的行政机关在撤销前所作出的具体行政行为不服的,向继续行使其职权的行政机关的上一级行政机关申请行政复议。
意会知识指人类知识总体中那些无法言传或不清楚的知识,其主要载体是个体,且拥有者往往没意识到自己拥有此类知识,意会知识来源于长期经验,它的发挥依赖特定的环境或氛围。根据上述定义,下列不属于意会知识的是:
拔除阻生牙,术后出现干槽症,经过处理后在创口内所填塞的碘仿纱条,抽除的时间为
患者,女,55岁。阵发性腹痛,腹胀3天,伴恶心呕吐,大便秘结,小便黄,舌红苔薄白,脉沉弦。查体:腹软,轻压痛,偶见肠型。诊断为肠梗阻,其证型是
A.地塞米松B.呋塞米C.阿托品D.碘解磷定E.甘露醇胆碱酯酶复活剂是
男,40岁,4个月前发热、腹痛、腹泻。服药1天好转,此后腹泻反复发作,多于劳累及进食生冷食物后,大便5~6次/日,稀便有黏液,有腹痛、里急后重。体检:左下腹压痛。大便镜检WBC20~30个/HP,RBC5~10个/HP,发现有结肠阿米巴滋养体。此病人最可能
2008年1月1日,A公司经批准新建一条新型产品生产项目,由X、Y两个单项工程构成。每个单项工程都是根据各道生产工序设计建造的,因此只有每项工程均建造完工后,整个生产项目才能正式运转。A公司将X工程出包给B公司,价款为3000万元人民币。对于Y工程,由于
农业科学研究所对水稻品种进行施肥试验。试验表明:在其他条件不变的情况下,如果钾肥比磷肥多,则品种1号比品种2号长势好;如果磷肥比钾肥多,则品种2号比品种1号长势好。根据这个结果可以推出以下哪一项?
YouwillhearapassagebetweenJohnandLarry,whoarediscussingthethornyissueofputtingmotivationaltechniquesintoprac
Thisisoneofthebestbooks()onthesubject.
最新回复
(
0
)