Did ancient humans cross Atlantic thousands of years before Columbus?Flam, Faye
D: The habitats of ancient humans. 相关知识点: 试题来源: 解析 1. B正确率: 50%, 易错项: C翻译一名澳大利亚研究人员认为她找到了答案:非洲国家博茨瓦纳的一个河谷。2. C正确率: 53%, 易错项: A翻译这种类型的DNA只能从母亲遗传给孩子。3. D正确率: 33%, 易错项: B翻译然而,一些专家怀疑海耶斯的...
Archaeological finds suggest that people developed numbers tens of thousands of years ago. Scholars are now exploring the first detailed hypotheses about this life-changing invention
Standards. What is the article mainly about? A. New findings about mtDNA. B. The habitats of ancient humans. C. The evolution of humans and tools. D. New findings about the origin of humans.相关知识点: 试题来源: 解析 (1) C (2) B (3) C (4) B (5) A (6) B反馈 收藏 ...
C.The evolution of humans.D.The habitats of ancient humans.. 相关知识点: 试题来源: 解析 (1)B.细节理解题.根据第一段An Australian researcher believes that she's found the answer:river valley in the African couiry of Botswana (博瓦纳).可知海耶斯人类的来源是在博瓦纳.故选B.(2)C.细节...
[04:18.60]to live outside of Africa - [04:20.80]including the area surrounding the hub. [04:24.40]Ancient intermixing by modern humans [04:27.36]has left small traces of Neanderthal [04:30.48]in the DNA of modern non-Africa...
importantB. wrongC. fascinatingD. unnecessary()55.What is the story mainly about?A. New findings about the origin of humans.B. New findings about mtDNA.C. The evolution of humans.D. The habitats of ancient humans. 相关知识点: 试题来源: 解析 C 53-55 BDA 反馈 收藏 ...
But why do we have wisdom teeth if we often need to get them removed? One theory has to do with our diets.Scientists say the diet of ancient humans probably required more chewing teeth.Life was probably a little rougher on the teeth back then,too.So it was good to have extras. ...
While modern frogs have several small teeth lining the edges of their mouths, their predecessors'jaws were much more menacing. The ancient ancestors, known as dissorophoids, boasted thousands of tiny hooked teeth throughout the roof of their mouths, as well as large fangs meant to sink into...
After about a million years, bigger cutting tools were created. Teardrop-shaped flat stones served as axes and were so practical they lasted another million years. About 40,000 years ago, ancient humans found new toolmaking materials. They repurposed the bones of many prey animals to fashion ...