首页
登录
职称英语
Hungry prehistoric bunters, not climate change, drove elephants to extinctio
Hungry prehistoric bunters, not climate change, drove elephants to extinctio
游客
2024-02-12
4
管理
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 [br] 【S4】
选项
答案
I
解析
此处应该是可数名词单数,作主语。hypothesis是可数名词单数,而且another hypothesis与前一句中的主语one theory形成并列关系,与下一段的第一句中tested two assumptions(检验了两种假说)前后照应。
转载请注明原文地址:https://tihaiku.com/zcyy/3444466.html
相关试题推荐
OnCulturalExchange1.如今,各国之间的文化交流越来越频繁2.有人支持,有人质疑3.我的看法
His______changeveryquickly;onemomenthe’scheerful,andthenexthe’scompl
[originaltext]Chequeshavelargelyreplacedmoneyasameansofexchange,f
[originaltext]Chequeshavelargelyreplacedmoneyasameansofexchange,f
[originaltext]TheclimateofthewestcoastisthemostmoderateinCanada.
[originaltext]TheclimateofthewestcoastisthemostmoderateinCanada.
Greatchangeshavetakenplaceinthemountainvillage,anditsappearanceis__
Recently,theUnitedNationsscientificpanelstudyingclimatechangedeclar
Change--ortheabilityto______(使自己适应变化中的环境)--isessentialtoevolution.adapt
QuickChangeinStrategyforaBooksellerInthemovieY
随机试题
[originaltext]M:Goodmorning,DoctorAlbert.W:Goodmorning.MayIhaveyour
患者男性,36岁。2周前发现右下后牙龈有小包,平时无明显不适。检查见46咬合面龋
女性,26岁,停经50后出现阴道少量流血伴右下腹隐痛。今晨起床时突然右下腹撕裂样
以下关于胃排空的说法错误的是:A.食物由胃内进入十二指肠的过程称为胃排空 B.
患者大便不通1周,伴腹中胀痛,胸胁痞满,苔薄腻,脉弦,治疗应选()A.大肠
下列哪项不符合漏出液形成机制?()A.血管内胶体渗透压升高 B.肿瘤压迫
肉芽组织在组织损伤的修复过程中 A.间质水分逐渐减少B.炎性细胞逐渐减少
(2020年真题)理财师小王与客户建立了信任关系,客户询问小王能否帮其代为操作投
1()直观给人以真实感、亲切感,它有利于激发学生的学习兴趣,调动学生学
血液中CO2的主要运输形式是( )。A.和水结合形成碳酸 B.形成碳酸氢盐
最新回复
(
0
)