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
考研
At around 1. 65 million years ago, another early human, Homo ergaster, started to create tools in a slightly different fashion.
At around 1. 65 million years ago, another early human, Homo ergaster, started to create tools in a slightly different fashion.
admin
2016-10-15
29
问题
At around 1. 65 million years ago, another early human, Homo ergaster, started to create tools in a slightly different fashion. This so-called Acheulean tradition was the tool-making technology used for nearly the entire Stone Age, and practiced until 100,000 years ago. Acheulean tools, such as hand axes and cleavers, were larger and more sophisticated than their predecessors’. They may have been status symbols as well as tools.
Homo ergaster first appeared in Africa around 2 million years ago, and in many ways resembled us. Though they had brow ridges, they had lost the stoop and long arms of their ancestors. They may have been even more slender than us and were probably well-adapted to running long distances. Some experts believe that they were the first to sport largely hairless bodies, and to sweat, though another theory puts our hairlessness down to an aquatic phase.
One famous example of a more modern looking early human is the Turkana boy, a teenager when he died, 1. 6 million years ago in Kenya. The shape of this fossil showed that the human pelvis had reached today’s narrow proportions. Combined with the growing size of the human head and brain, this had far-reaching implications; human women now need help for a successful birth; and human babies are born earlier, and need a longer period of childhood care, than those of apes.
Meat-eating, however, may have allowed us to become early weaners.
H. ergaster may have been the first early human to leave Africa. Bones dated to around 1. 75 million years ago have been found in Dmanisi in Georgia.
Shortly afterwards, Homo erectus appeared—the first early human whose fossils have been seen in large numbers outside of Africa. The first specimen discovered, a single cranium, was unearthed in Indonesia in 1891. H. erectus was highly successful, spreading to much of Asia between 1. 8 and 1. 5 million years ago, and surviving as recently as 27,000 years ago.
This species, with a brain volume of around 1000 cm
3
would have interacted with modern humans. They may have been the first people to take to the seas and habitually hunt prey such as mammoths and wild horses, although there is some debate about this. They may also have harnessed the use of fire and built the first shelters.
In 2004, the remains of a tiny and mysterious human species, that may have lived as recently as 13,000 years ago, was discovered on an Indonesian island. More bones of the "hobbit", or Homo floresiensis, were uncovered in 2005. Some studies suggest it had an advanced brain and was unequivocally a separate species—but others argue that these people were modern humans suffering from a genetic disorder.
Help is needed for a woman to bear a baby mainly because______.
选项
A、human babies are larger
B、human pelvis is narrower
C、human babies are born earlier
D、childhood care is much longer
答案
B
解析
根据第三段第二句“…the human pelvis had reached today’s narrow proportions”和第三句“…this had far-reaching implications:human women now need help for a successful birth…”,B应为答案。
转载请注明原文地址:https://kaotiyun.com/show/WQoZ777K
0
考研英语一
相关试题推荐
Human-inducedclimatechangeislikelytomakemanypartsoftheworlduninhabitable,oratleastuneconomic.Overthecourseof
Oneoftheleastappreciatedbutmostremarkabledevelopmentsofthepast60yearsistheextraordinarygrowthofAmericanagric
Theirdefenderssaytheyaremotivated,versatileworkerswhoarejustwhatcompaniesneedinthesedifficulttimes.Toothers,
GivetheSenatesomecredit:inshapingthecurrentimmigration-reformbill,ithascomeupwithoneideathatalmosteverybody
Thedestructionofournaturalresourcesandcontaminationofourfoodsupplycontinuetooccur,largelybecauseoftheextreme
Thejobrecoverycouldperhapsbestbedescribedasmodest,andFriday’sjobsreportforMayfurthersolidifiedthatdescript
Mothersinterferewiththeirchildren’slivesevenmorethanmostoffspringrealize.Thattheynagabouteatinghabitsiswellk
HaroldVarmusisamanonamission—aquesttoliberatescientificknowledgefromtheboundsofjournalsandcopyrightsandmake
动物的权利问题——1997年英译汉及详解Doanimalshaverights?Thisishowthequestionisusuallyput.Itsoundslikeauseful,ground-clearing
随机试题
违法事实确凿并有法定依据,行政机关可以当场处罚的有()
血BUN/Cr比值明显升高见于
某已婚妇女闭经50天,有恶心呕吐症状,子宫大,初步诊断为早孕。如确诊早孕,此妇女不可能出现
国家对医疗器械管理分为()
在下列风险中,不属于个人教育贷款中贷款受理和调查中的风险的是()。
下列属于战略性人力资源管理的工具的有()。
广东菜的代表菜是()
国家教委强调指出。高等教育进一步改革发展,要解决好“全面提高办学的质量和效益”这一重大问题。请根据你所了解的情况和工作实践,谈谈教育厅应如何抓好高校教育质量的工作。
()是指导人民警察正确办案的一项重要刑事政策。
(1)ThenumberofwomendirectorsappointedtocorporateboardsintheUnitedStateshasincreaseddramatically,buttheratioof
最新回复
(
0
)