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 bunters, not climate change, drove elephants to extinction during the Pleistocene era(更新世), new research sugg
Hungry prehistoric bunters, not climate change, drove elephants to extinction during the Pleistocene era(更新世), new research sugg
admin
2013-06-17
34
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
【S8】
选项
答案
G
解析
此处应该是状语成分,由副词充当。从上下文语义的逻辑性看,只有already合适。
转载请注明原文地址:https://kaotiyun.com/show/xaM7777K
0
大学英语四级
相关试题推荐
Inthe1960s,medicalresearchersThomasHolmesandRichardRahedevelopedachecklistofstressfulevents.Theyappreciatedthe
Inthe1960s,medicalresearchersThomasHolmesandRichardRahedevelopedachecklistofstressfulevents.Theyappreciatedthe
YukonGoldRushDiscoveryInAugust1896,threepeopleledbySkookumJimMasonheadednorth,downtheYukonRiverfromthe
YukonGoldRushDiscoveryInAugust1896,threepeopleledbySkookumJimMasonheadednorth,downtheYukonRiverfromthe
YukonGoldRushDiscoveryInAugust1896,threepeopleledbySkookumJimMasonheadednorth,downtheYukonRiverfromthe
Peoplebecomequiteillogicalwhentheytrytodecidewhatcanbeeatenandwhatcannot.IfyoulivedintheMediterranean,for
Peoplebecomequiteillogicalwhentheytrytodecidewhatcanbeeatenandwhatcannot.IfyoulivedintheMediterranean,for
Peoplebecomequiteillogicalwhentheytrytodecidewhatcanbeeatenandwhatcannot.IfyoulivedintheMediterranean,for
Keepingafullsocialcalendarmayhelpprotectyoufromdementia(痴呆症),researcherssaidonMonday.【1】activepeoplewhowereno
随机试题
锻压机械的结构不但应保证设备运行中的安全,而且应能保证安装、拆卸和检修等各项工作的安全;此外,还必须便于调整和更换易损件,便于对在运行中应取下检查的零件进行检查。下列关于锻压机械安全技术要求的说法中,错误的是()。
在品德评估的主要工具中,简便易行、概括性强,但缺乏统一标准,主观随意性大,可靠性差的方法是指()
简述阶级消灭和国家消亡的条件。
下列胰液成分中,哪种是由小导管细胞分泌的()
低钾血症错误的临床表现是
根据《医疗机构药事管理规定》,医院药师的工作职责不包括
项目经理对职能部门发出支持工作的请求,职能部门向项目部提供指导性意见,项目经理对这些意见无权不予采纳或不经协调就作出重大调整改变。这种项目管理组织方式是()组织。
在建筑安装工程费用中,临时设施费包括在( )之中。
简述广告标语的创作要求有()。
以下合同属于有效的人事合同的是()。
最新回复
(
0
)