首页
登录
职称英语
What is the main idea of this passage? [originaltext] About one million years
What is the main idea of this passage? [originaltext] About one million years
游客
2023-11-07
52
管理
问题
What is the main idea of this passage?
About one million years ago, the Ice Age began. The Ice Age was a long period of time in which four great glaciers pushed southward to cover almost all the upper half of North America, and then melted away. Each glacier was a thick sheet of ice and snow that spread out from a centre near what is now Hudson Bay in Canada. The winters were long, and the cool summers were too short to melt much of the ice and snow. The ever-growing sheet built up to a thickness of two miles at its centre. As all glaciers do, these great glaciers slid. They pushed down giant trees in their paths and scraped the earth bare of soil. Many animals moved farther south to escape. Others stayed and were destroyed. When winters of little snow came, the summer suns cut into the edges of the ice sheets. As the glaciers melted, rocks, soil and other things that had mixed with the ice and snow were left. New hills, lakes and rivers were formed. The last of the great glaciers began its melting about 11,000 years ago. Its melting formed the Great Lakes. These lakes are today a little changed from their early sizes and shapes. The largest of the North American river systems was also influenced by the glaciers. This is the Mississippi-Missouri-Ohio system. These rivers were miles wide at first. Through the years they settled into their present channels.
选项
A、The Ice Age was a long period of time.
B、Great glaciers covered Norm America many years ago.
C、Changes in climate helped to melt the glaciers.
D、How glaciers changed North America.
答案
D
解析
主旨题。对于这类问题应十分关注首尾句。文章开篇讲到冰河时期里4块巨大的冰川向南移动覆盖了北美洲的上半部。之后文章主要讲述冰川移动和融化过程中对北美洲产生的影响。故选项D正确。
转载请注明原文地址:http://tihaiku.com/zcyy/3166688.html
相关试题推荐
WhodiedlastMonday?[br][originaltext]Dignitariesfromaroundtheworld
WhodiedlastMonday?[originaltext]Dignitariesfromaroundtheworldhaveb
Thoseconvictedofracismwillbe[originaltext]Finally,theauthoritiesin
Australia’snewPrimeMinisterKevinRuddhasopposed[originaltext]Australi
Whatisthepassagemainlyabout?[br][originaltext]Settlersoriginallyca
Whatisthepassagemainlyabout?[originaltext]Settlersoriginallycameto
What’stheconversationmainlyabout?[br][originaltext]W:Hi,Bill.Youweren
What’stheconversationmainlyabout?[originaltext]W:Hi,Bill.Youweren’tin
Whatdidthewomanthinkatfirst?[br][originaltext]W:Ihadareallystrange
Whatdidthewomanthinkatfirst?[br][originaltext]W:Ihadareallystrange
随机试题
TodayIwouldliketotellyouabouttheeffectsofoldageonhealth.Actua
静坐生活方式对健康的危害包括()。A.代谢性疾病 B.消化系统疾病 C.骨骼
A评估专业人员对振华汽运公司的十余辆重型运输汽车进行价值评估,经查,这十余辆汽车
按照承担法律责任要件对劳动争议案例进行分析,其思维结构包括()A:分析确定劳动争
人在每一瞬间,将心理活动选择了某些对象而忽略了另一些对象。这一特点指的是注意的(
我国预算年度的起止时间是每年的()。A.1月1日至同年的12月31日
股指期货可作为()的工具。A.投机 B.保值 C.增值 D.资产管理
将库存分类为商品库存、制造业库存和其他库存的依据是()。A.库存的经济用途
某国际工程投标过程中,投标人员在复核工程量时发现土方部分的工程量计算存在较大误差
IPv6的主要优势体现在()。A.充足的地址空间 B.更小的路由表 C.改
最新回复
(
0
)