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
2024-02-29
39
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/3493201.html
相关试题推荐
【S1】[br]【S2】Change→changes:名词复数。
【B1】[br]【B14】A、affectB、goodnessC、effectD、changeB文中指这种经历给我们的生活带来连锁影响。此处应选择名
TheWorldinaGlass:SixDrinksThatChangedHistoryTomSta
TheWorldinaGlass:SixDrinksThatChangedHistoryTomSta
TheWorldinaGlass:SixDrinksThatChangedHistoryTomSta
TheWorldinaGlass:SixDrinksThatChangedHistoryTomSta
TheWorldinaGlass:SixDrinksThatChangedHistoryTomSta
TheWorldinaGlass:SixDrinksThatChangedHistoryTomSta
BritishColumbiahasgreatervariationsinclimatethananyotherprovinceinCa
BritishColumbiahasgreatervariationsinclimatethananyotherprovinceinCa
随机试题
Theamazingsuccessofhumansasa【1】istheresultoftheevolutionarydevel
Thoseworld-famousoilpaintings(exhibit)______attheMuseumofNewYorknoware
学校德育的基本途径是()A.教学 B.社会实践活动 C.课外活动 D.班
对于那些自觉遵守会计职业道德规范的优秀会计工作者应进行表彰。()
A提示:利用两函数乘积的导数公式计算。
能让学生充分交流互动并有利于发挥其主体作用的教学组织形式是( )。A.道尔顿制
绩效考评标准分为两种,即()。A:分解提问标准、综合提问标准 B:分解提问标准
()是对已经识别和计量的风险采取分散、对冲、转移、规避和补偿等措施,进行有效管理
下列活动,不属于电子商务的是()。A.电子支付 B.实体店铺购物 C.网上
下列关于预制钢筋混凝土楼板构造,说法正确的有()。A.预制实心平板跨度较小,可
最新回复
(
0
)