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
2023-07-11
18
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] 【S2】
选项
答案
O
解析
此处需要一个由限定词two修饰的复数名词作句子的主语。只有species是复数名词,且与前一句中的 kinds属于同义词,two species of elephants意为“两种大象”。
转载请注明原文地址:https://tihaiku.com/zcyy/2828198.html
相关试题推荐
Itisurgedbythegovernmenttofosterasocialclimateof___________(尊师重教).sho
A______changeinpolicyisneededifrelationsareevertoimprove.A、strictB、
[originaltext]Twiceayear,alltheclocksintheUnitedStatesarechanged
Everychemicalchangeeitherresultsfromenergybeingusedtoproducethechang
Howoldis"old"?Theanswerhaschangedovertheyears.Twohundredyearsa
ClimateChangeMayMakeInsect-BorneDiseasesHardertoControl
ClimateChangeMayMakeInsect-BorneDiseasesHardertoControl
ClimateChangeMayMakeInsect-BorneDiseasesHardertoControl
ClimateChangeMayMakeInsect-BorneDiseasesHardertoControl
ClimateChangeMayMakeInsect-BorneDiseasesHardertoControl
随机试题
ThingsYouCan’tSayinCanadaA)Attackingoursacredcows(thingsorp
Epicureansdiscoveraplacethroughitstastes.Fromthesweetstickyjuicesof
Thereceptionwasattendedby______membersofthelocalcommunity.(2006年考试真题)A
A.淋巴管瘤 B.甲状舌管囊肿 C.神经鞘瘤 D.血管瘤 E.颈动脉体瘤
以下关于产褥的说法错误的是A、盆底肌及其筋膜因分娩过度扩张使弹性减弱,伴有肌纤维
定经汤适用于( )。A.月经后期,血寒证 B.月经后期,虚寒证 C.月经先
下列房屋中,可以免征房产税的有()。(2011年真题)A.人民团体出租的房屋
共用题干 1岁半男婴,发热4天,伴咳嗽,流涕,眼结膜充血,流泪,半天前发现患儿
《晋书-刑法志》:“峻礼教之防,准五服以治罪。”“服制若近,以尊犯卑,处刑则轻,
推土机宜用于( )以内运距、Ⅰ~Ⅲ类土的挖运。A.50m B.100m C
最新回复
(
0
)