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
30
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] 【S1】
选项
答案
N
解析
此处需要一个能跟不定式词to的动词作谓语的一部分。从词库中的六个动词来看,used与协搭配,意为“过去常常”,与后一句的Today形成对比,故为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3444463.html
相关试题推荐
Methodsoftraininganimalshavechangedgreatlyinrecentyears.Zookeepersha
Methodsoftraininganimalshavechangedgreatlyinrecentyears.Zookeepersha
[originaltext]Therehavebeenmanygreatinventions,thingsthatchangedthewa
[originaltext]Therehavebeenmanygreatinventions,thingsthatchangedthewa
Hungryprehistoricbunters,notclimatechange,droveelephantstoextinctio
Hungryprehistoricbunters,notclimatechange,droveelephantstoextinctio
Hungryprehistoricbunters,notclimatechange,droveelephantstoextinctio
Hungryprehistoricbunters,notclimatechange,droveelephantstoextinctio
Hungryprehistoricbunters,notclimatechange,droveelephantstoextinctio
Hungryprehistoricbunters,notclimatechange,droveelephantstoextinctio
随机试题
______isavoicelesslabiodentalfricative.A、[f]B、[d]C、[g]D、[v]A[f]属于清音、唇齿音
SurvivingtheRecessionAmerica’srecessionbeganqu
______,glassescancorrectmostsightdefectsinhealthyeyes.A、Whenwell-fitte
Drunkendriving—sometimescalledAmerica’ssociallyacceptedformofmurder—
A
1.事故经过 某装饰公司在综合实验研究平台项目精装修工程2号地下车库入口钢
患儿女,4个月。腹泻4天,每日10余次蛋汤样便。查体:前囟、眼窝凹陷明显,皮肤弹
房屋建筑工程保修期从( )之日起计算。A、工程竣工验收合格 B、工程交付使用
知识准备
尿红细胞形态检查是判断A.IgA肾病与过敏性紫癜肾损伤 B.原发与继发肾小球疾
最新回复
(
0
)