首页
登录
职称英语
History of American ImmigrationA)Ancient peoples only l
History of American ImmigrationA)Ancient peoples only l
游客
2023-07-10
59
管理
问题
History of American Immigration
A)Ancient peoples only loosely related to modern Asians crossed the Arctic land bridge to settle America about 15,000 years ago, according to a study offering new evidence that the Western Hemisphere had a more genetically diverse population at a much earlier time than previously thought. The early immigrants most closely resembled the prehistoric Jomon people of Japan and their closest modern descendants, the Ainu, from the Japanese island of Hokkaido, the study said. Both the Jomon and Ainu have skull and facial characteristics more genetically similar to those of Europeans than those of mainland Asians.
B)The immigrants settled throughout the hemisphere, and were in place when a second migration — from mainland Asia — came across the Bering Strait beginning 5,000 years ago and swept southward as far as modern-day Arizona and New Mexico, the study said. The second migration is the genetic origin of today’s Eskimos, Aleuts and the Navajo of the US southwest. The study in today’s edition of the Proceedings of the National Academy of Sciences adds new evidence to help settle one of anthropology’s(人类学)most controversial debates: Who were the first Americans? And when did they come?
C)"When this has been done before, it’s been done from one point of view," said University of Michigan physical anthropologist C. Loring Brace, who led the team of researchers from the United States, China and Mongolia who wrote the new report. "We try to put together more aspects." For decades, anthropologists held that the Americas were populated by a single migration from Asia about 11,200 years ago — the supposed age of the earliest of the elegantly crafted, grooved arrowheads first found in the 1930s in Clovis, N.M. By the end of the 1990s, however, the weight of evidence had pushed back the date of the first arrivals several thousand years. A site at Cactus Hill, near Richmond, may be 17,000 years old. In Chile, scientists discovering a 12,500-year-old settlement at Monte Verde have found evidence of a human presence that may extend as far as 30,000 years. But as the migration timetable went on, additional questions have arisen. The 1996 discovery in Kennewick, Washington, of the nearly complete skeleton of a 9,300-year-old man with "apparently Caucasoid" features stimulated interest in the possibility of two or more migrations — including the possible incoming from Europe.
D)The new study attempted to answer this question by comparing 21 skull and facial characteristics from more than 10,000 ancient and modern populations in the Western Hemisphere and the Old World. The findings provide strong evidence supporting earlier work suggesting that ancient Americans, like Kennewick Man, were descended from the Jomon, who walked from Japan to the Asian mainland and eventually to the Western Hemisphere on land bridges as the Earth began to warm up about 15,000 years ago at the end of the last Ice Age.
E)Brace described these early immigrants as "hunters and gatherers" following herds of mastodon(乳齿象)first into North America, and eventually spreading throughout the hemisphere. Because the North — in both Siberia and Canada — was still extremely cold, only a limited number of people could make the trek(长途跋涉)and survive. So immigration slowed, Brace said, for about 10 millennia(一千年). Then, about 5,000 years ago, agriculture developed on mainland Asia, enabling people to grow, store and carry food in more lonely areas. Movement resumed, but the newcomers were genetically Asians — "distinct racially" from the first wave, Brace added.
F)The second wave spread across what is now Canada and came southward, cohabiting(同居)with the earlier settlers and eventually creating the mixed population found by the Spaniards in the 15th century. While many researchers agree on the likelihood of two migrations, both their timing and origin are matters of dispute. Brace’s team suggests that both movements occurred after the last Ice Age began to moderate between 14,000 and 15,000 years ago.
G)But University of Pennsylvania molecular anthropologist Theodore Schurr said genetic data in American populations suggest that humans may have been in the Western Hemisphere much earlier — 25,000 to 30,000 years ago. This would mean that the first wave came before the "glacial maximum" between 14,000 and 20,000 years ago, when the Ice Age was at its fiercest and "human movement was practically impossible," Schurr said. "Were there people here before the last glacial maximum?" he asked. "The suggestion is ’Yes’".
H)The third wave arose in the American continent around the year 1000, when a small number of Vikings arrived. Five hundred years later, the great European migration began. In some cases, the co-existence of Europeans and Native Americans was peaceful. In other cases, there were cultural clashes, leading to violence and disease. Many people from Africa, however, were bought here against their will to work as forced laborers in the building of a new nation. As early as 1619, slaves from Africa and the Caribbean were brought forcibly to America. Later, 102 English colonists(later referred to as the "Pilgrims")set sail in 1620 on the Mayflower. They landed in Plymouth, Massachusetts. This is generally considered by many to be the "start" of planned European migration! In 1638, just 18 years after the Mayflower, the Swedes began their migration to America. Unlike the Pilgrim Fathers, the Swedes were not religious opponents — they were an organized group of colonizers sent by the Swedish Government to establish a colony in Delaware. In 1655, the colony was lost to the Dutch. In the mid-1840s, a wave of Swedish migration began with the landing of a group of migrant farmers in New York and continued up to World War I.
I)During the colonial era most of the immigrants to the US came from Northern Europe. Their numbers declined during the 1770s, but picked up during the mid-1800s. New arrivals came from several countries, but mostly from Germany and Ireland where crop failures caused many to leave their homelands. Other groups also arrived from the Netherlands, Spain, Italy, the Scandinavian countries, and Eastern Europe. [br] Many researchers have different opinions about the first two migrations in the aspect of origin and timing.
选项
答案
F
解析
根据题目中的线索词Many researchers和origin and timing将本题出处定位到F)段第2句一该句提到,虽然许多研究者同意这两次移民的可能性,但是,他们对移民时间和种族起源还存在争论。题干是对句子后半部分的同义转述,其中的different opinions about对应文中的matters of dispute。
转载请注明原文地址:http://tihaiku.com/zcyy/2823490.html
相关试题推荐
InancientGreeceathleticfestivalswereveryimportantandhadstrongreli
InancientGreeceathleticfestivalswereveryimportantandhadstrongreli
InancientGreeceathleticfestivalswereveryimportantandhadstrongreli
InancientGreeceathleticfestivalswereveryimportantandhadstrongreli
InancientGreeceathleticfestivalswereveryimportantandhadstrongreli
InancientGreeceathleticfestivalswereveryimportantandhadstrongreli
InancientGreeceathleticfestivalswereveryimportantandhadstrongreli
InancientGreeceathleticfestivalswereveryimportantandhadstrongreli
InancientGreeceathleticfestivalswereveryimportantandhadstrongreli
InancientGreeceathleticfestivalswereveryimportantandhadstrongreli
随机试题
Childrenare【C1】______seriousillnessesbecauseoftheirparentssmokingat
药品不良反应监测方法包括()A:药物警戒 B:集中监测系统 C:自愿呈报系统
由于发包人原因导致工程无法按规定期限竣工验收的,在承包人提交竣工验收报告一定期限
女,30岁,右上肢开水烫伤1小时,查右上肢散在小水疱,部分表皮脱落,创基红白相间
体育教育的三个基本要素是()A.体育教师、学生、教学方法 B.教学物质条件
自动化仪表工程施工程序中,仪表单体校验的紧前工序是()。A、电缆敷设 B、取源
开窍于耳及二阴的是A.肾 B.脾 C.胃 D.膀胱 E.肺
下列各句中,没有语病的一句为()。 A学海无涯,公务员要着力持续更新
将《义勇军进行曲》作为国歌正式写人宪法的是()年宪法修正案。 A.198
典型的食管癌症状是( )。A.进行性吞咽困难 B.进餐后上腹痛,至下一餐前缓
最新回复
(
0
)