首页
登录
职称英语
Hungry prehistoric hunters, not climate change, drove elephants to extinctio
Hungry prehistoric hunters, not climate change, drove elephants to extinctio
游客
2023-07-28
19
管理
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 [br] 【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://tihaiku.com/zcyy/2876941.html
相关试题推荐
[originaltext]Beingbilingualproduceschangesintheanatomyofthebrain,
[originaltext]Beingbilingualproduceschangesintheanatomyofthebrain,
[originaltext]M:Excuseme,doyouhavechangeforaten-dollarnote?Ineedtop
[originaltext]M:Excuseme,doyouhavechangeforaten-dollarnote?Ineedtop
[originaltext]M:Excuseme,doyouhavechangeforaten-dollarnote?Ineedtop
[originaltext]M:Excuseme,doyouhavechangeforaten-dollarnote?Ineedtop
[originaltext]W:Everyoneseemstobetalkingaboutclimatechangethesedays!
[originaltext]W:Everyoneseemstobetalkingaboutclimatechangethesedays!
Climate,morethananyothersinglefactor:determinesthedistributionsof
Climate,morethananyothersinglefactor:determinesthedistributionsof
随机试题
Ingeneral,oursocietyisbecomingoneofgiantenterprisesdirectedbyab
[originaltext]W:Hey,Tom.What’sup?Whereareyouoffto?M:I’monmywayto
Palenquewasfoundedthreecenturiesagobyrunawayslavesinthejungleof
一定社会的政治制度决定着教育目的的性质,生产力发展水平决定着培养人才的质量规格。
下列关于HIV无症状感染期的描述,正确的是A.无传染性 B.常出现口腔毛状白斑
以()为中心设计的部门结构包括事业部制和模拟分权制。A:成果 B:工作 C:
A. B. C. D.
中国草莓公司与法国树莓公司订立了向中国进口货物的买卖合同,并订有在中国国A仲裁委
下列选项属于工资薪金的有()。A.基本工资 B.独生子女补贴 C.奖金
影响弗里德曼货币需求函数的因素有()。A.物价水平 B.恒久性收入 C.
最新回复
(
0
)