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
Why are "Clovis people" believed to first enter North America?
Why are "Clovis people" believed to first enter North America?
admin
2009-03-16
37
问题
Why are "Clovis people" believed to first enter North America?
In the 1930s, archaeologists discovered spear points in the New Mexico town of Clovis, dated from around 13,000 years ago. The individuals who made them have since become known as the "Clovis people" and are believed by many to have been the first people to enter North America.
The "Clovis first" theory proposes that around 14,000 years ago people traveled across a land bridge that existed between Siberia and Alaska. Once in North America, their journey took them through a corridor that opened up between the ice sheets in Western Canada making them the first to be able to enter the interlor of the continent. It’s an elegant and almost biblical explanation; but more recent fossil finds question the theory. Some researchers believe the first people entered North America much earlier—perhaps as long as 20,000-30,000 years ago.
In more recent years, the Pacific coast has been seen as an alternative route of entry-possibly at an earlier date than the Clovis. There is little direct evidence to support this, but fossil evidence from the islands of south-east Alaska tells us that this region, or part of it, was free of ice and may have been a refuge for animals throughout the ice age.
If animals such as bears and foxes lived here then why not people? Fossilized human remains have been found on Alaska’s Prince of Wales Island and much further south on the Channel Islands off California. These are thought to be as old as some of the Clovis .finds and it may only be a matter of time before older remains are discovered.
If people did travel down the coasts between islands, they must have used boats. Although the coastal route still lacks a lot of hard evidence, the relatively recent discovery of a stone tool off the coast of British Columbia has added support to the idea.
选项
A、The land bridge between Siberia and Alaska.
B、Western Canada.
C、Wales Island
D、The Pacific coast.
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/LtPd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
Whatdoesthespeakersuggestthatthestudentsshoulddoduringtheterm?
Somemodemcitiesareusuallyfamousforpeoplewholiveaverylongtime.
Somemodemcitiesareusuallyfamousforpeoplewholiveaverylongtime.
Answerquestions71~80byreferringtothefollowinggames.Note:AnswereachquestionbychoosingA,B,CorDandmarkiton
Somepeoplelearnbestwhenaclassroomlessonispresentedinanentertaining,enjoyableway.Otherpeoplelearnbestwhenale
ShortagesoffluvaccinearenothingnewinAmerica,butthisyear’sisawhopper.Untillastweek,itappearedthat100millio
ShortagesoffluvaccinearenothingnewinAmerica,butthisyear’sisawhopper.Untillastweek,itappearedthat100millio
Childrenwhogriptheirpenstooclosetothewritingpointarelikelytobeatadisadvantageinexaminations,【31】______tothe
Whenitcomestotheslowingeconomy,EllenSperoisn’tbitinghernailsjustyet.Butthe47-year-oldmanicuristisn’tcutting,
Aneweraisuponus.Callitwhatyouwill:theserviceeconomy,theinformationage,theknowledgesociety.Italltranslates
随机试题
城市发展战略的内容是什么?
国家确定的重要江河的流域综合规划,由()会同有关部门和有关省、自治区、直辖市人民政府编制。
项目管理规划按照管理组织可分为()等。
已知某地区2001~2009年钢材使用量(单位:吨),如表23—2所示。则该地区2001~2009年钢材年均使用量为()吨。
苏轼在《食荔枝》里面写道:“日啖荔枝三百颗,不辞长作岭南人。”据此回答下列问题。安徽省不能种植荔枝的限制性因素主要是()。
一、注意事项1.申论考试是对应考者阅读理解能力、综合分析能力、提出和解决问题能力、文字表达能力的测试。2.作答参考时限:阅读材料40分钟,作答110分钟。3.仔细阅读给定的资料,按照后面提出的“作答要求”依次作
心理与教育统计的主要内容有哪些?
复员兵甲男在火车站候车,遇乙女后,两人热情攀谈。乙称自己也在候车并建议出去走走,又称自己最喜欢当兵的。至公园僻静处,两人即拥抱、接吻,随后发生了两性关系。经查,乙女家就住在本地,是个精神病患者。甲某的行为()。
Ifyouwerestartingatopuniversitytoday,whatwoulditlooklike?Youwouldstartbygatheringverybestmindsfrom【M1】____
A、Getangry.B、Lookaway.C、Begincrying.D、Ignoreit.D细节题。文中提到,Ifyoumakealoudsoundnearadayoldbaby’shead,youwillno
最新回复
(
0
)