首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
(1)A period of climate change about 130,000 years ago would have made water travel easier by lowering sea levels and creating na
(1)A period of climate change about 130,000 years ago would have made water travel easier by lowering sea levels and creating na
admin
2019-03-25
52
问题
(1)A period of climate change about 130,000 years ago would have made water travel easier by lowering sea levels and creating navigable lakes and rivers in the Arabian Peninsula, the study says. Such a shift would have offered early modern humans—which arose in Africa about 200,000 years ago—a new route through the formerly scorching northern deserts into the Middle East. The new paper was spurred by the discovery of several 120,000-year-old tools at a desert archaeological site in the United Arab Emirates. The presence of the tools—whose design is uniquely African, experts say—so early in the region suggests early humans marched out of Africa into the Arabian Peninsula directly from the Horn of Africa, roughly present-day Somalia. Previously, scientists had thought humans first left via the Nile Valley or the Far East.
(2)"Up till now we thought of cultural developments leading to the opportunity of people to move out of Africa," said study co-author Hans-Peter Uerpmann, a retired archaeobiologist at the University of Tubingen in Germany. "Now we see, I think, that it was the environment that was the key to this," Uerpmann said during a press briefing Wednesday.
(3)The discovery "leaves a lot of possibilities for human migrations, and keeping this in mind, might change our view completely." During the past few years, a series of tools were discovered at the Jebel Faya site in the U.A.E., some of which—such as hand axes—had a two-sided appearance previously seen only in early Africa
(4)Scientists used luminescence dating to determine the age of sand grains buried with the stone tools. This technique measures naturally occurring radiation stored in the sand. For the climatic data, scientists studied the climate records of ancient lakes and rivers in cave stalagmites, as well as changes in the level of the Red Sea. This warmer period 130,000 years or so ago caused more rainfall on the Arabian Peninsula, turning it into a series of lush rivers that humans might have boated or rafted.
(5)During this period the southern Red Sea’s levels dropped, offering a "brief window of time" for humans to easily cross the sea—which was then as little as 2.5 miles wide, according to Adrian Parker, a physical geographer from Oxford Brookes University in the United Kingdom.
(6)Once humans entered the peninsula, they dispersed and likely reached the Jebel Faya site by about 125,000 years ago, according to the study, published in the journal Science.
(7)Geneticist Spencer Wells called the discovery a "very interesting find," especially because the Arabian Peninsula is becoming a hot spot for archaeological finds—particularly underwater, since the Persian Gulf was a fertile river delta during early human migrations. But he noted that the study doesn’t "rewrite the book on what we know about human migratory history." That’s because tools dating to the same period have already been found in Israel, so it’s "consistent with what we suspected" about an earlier wave of migration into the Middle East, said Wells, director of the National Geographic Society’s Geographic Project. Wells also noted there’s no evidence yet that the migrants in the new paper were our ancestors—the group, and their genes, may have died out long ago.
(8)Bence Viola, of the Max-Planck-Institute for Evolutionary Anthropology in Leipzig, Germany, agreed the finding was interesting but not that surprising, also citing the evidence of humans in Israel about 120,000 years ago. Viola, who wasn’t involved in the study, added that the migration route proposed in the paper makes sense on another level—the Arabian Peninsula would have been something early humans were used to. "If you look even today, the environment in the Horn of Africa, in Somalia or northern Ethiopia, is similar to what you see in Oman or Yemen—not like the big desert," Viola noted. "It’s not like they needed to adapt to a completely different environment—it’s an environment that they knew."
(9)Why they made the trek is another question, since they wouldn’t have been hurting for food or resources in their African homeland, Viola noted. "Curiosity," he said, "is a pretty human desire."
The scientists resorted to the following data sources in the research EXCEPT _____.
选项
A、radiation of the ancient lake water
B、radiation detected in the sand
C、the fluctuation of ocean levels
D、appearance of the stone tools
答案
A
解析
D项与第3段末句中石制工具的appearance相吻合,选项B、C分别在第4段第2句和第3句中找到依据。本题为反选题,要求选出与文章不相符的一项,故选项A正确。
转载请注明原文地址:https://www.kaotiyun.com/show/OxEK777K
0
专业英语八级
相关试题推荐
Peoplelearnlanguagesallthetime,andforallkindsofreasons.Forexample,youprobablyhavevariousreasonstostudy【M1】__
TheInternetprovidesanamazingforumforthefreeexchangeofideas.Giventherelativelyafewrestrictionsgoverningaccess
Bargeswhichcarriermostoftheheavyfreightonriversandcanalsareusuallypropelledbytowing.
Acommonusewithgoldinthenineteenthcenturywasasastandardforthevalueofmoney.
HowtoWriteaResearchReportAstandardformatwillhelpreaderstolocatetheinformationtheywantquickly.Itistruethat
要一个人独自进食,即使不算重罚,在中国文化中通常也被视为不幸,一种不无悲凉的境地。汉语对吃独食的描述,大都乏善可陈,一句“胡乱吃了些”搪塞过去。中国人的社会中,人必须借饮食与他人沟通,与社会上的人形成生命共同体之感受。如今,大家庭在解体,晚婚、单
A、Literarycriticism.B、Communicationstheory.C、Economics.D、Advancedresearch.D句(8)中,女士说如果男士对先进的研究感兴趣的话,那么UBC将是他的理想之地,因为IJBC因
(1)DetroitseemstobewhereWallStreetmeetsMainStreet.TightcreditisreckonedtohavecosttheAmericancarmakers40,000
Languagepervadessociallife.Itistheprincipalvehicleforthetransmissionofculturalknowledge,andtheprimarymeansby
(1)DetroitseemstobewhereWallStreetmeetsMainStreet.TightcreditisreckonedtohavecosttheAmericancarmakers40,000
随机试题
某患急性白血病患者在化疗期间,近1天尿量1000ml,此时最重要的护理措施为
对HIV并发症的编码规则叙述错误的是
在下列情况中,母亲仍应哺乳的是
我国城市规划行政体系的构成主要有几个层次?
指标在综合评价中的重要性可以从下列几个方面进行综合判别( )。
按《新巴塞尔资本协议》的划分,商业银行的风险主要有()。
纳税人、扣缴义务人、纳税担保人同税务机关在纳税上发生争议时,可以依法申请行政复议,也可以依法向人民法院起诉。()
小偷甲在某商场窃得乙的钱包后逃跑,乙发现后急追。甲逃跑中撞上欲借用商场厕所的丙,因商场地板湿滑,丙摔成重伤。下列哪些说法是错误的?()[2012年法考真题]
个别人因在网上发帖造谣说地震即将发生,造成了民众心理上的恐慌,进而影响到社会的稳定。因此,造谣者被公安部门依法行政拘留。这个案例告诉我们
スーツケース
最新回复
(
0
)