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
2023-11-12
78
管理
问题
What is the main idea of this passage?
About one million years ago, the Ice Age began. (18)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. (19)As all glaciers do, these glaciers slid. (20)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. (20)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. (20) These lakes are today 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 North America many years ago.
C、Changes in climate helped to melt the glaciers.
D、How glaciers changed North America.
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3181483.html
相关试题推荐
What’sthenewsitemmainlyabout?[br][originaltext]InEgypt,theMuslim
Whatdoesthemansayaboutbeersincethe1990s?[br][originaltext]W:Mr.Smi
Whatdoesthemansayaboutbeersincethe1990s?[originaltext]W:Mr.Smith,co
Wheredidtheeventhappen?[br][originaltext]W:LostandFoundOffice,canI
Wheredidtheeventhappen?[br][originaltext]W:LostandFoundOffice,canI
Accordingtothedialogue,whatwilltheydotomorrow?[br][originaltext]W:To
Accordingtothedialogue,whatwilltheydotomorrow?[br][originaltext]W:To
Accordingtothedialogue,whatwilltheydotomorrow?[originaltext]W:Tom,hav
Wheredoesthisconversationtakeplace?[br][originaltext]W:Goodmorning,si
Whydidn’tthewomanwanttogotoChangzhou?[br][originaltext]W:David,weh
随机试题
[originaltext]M:Mycarisinthegarage.It’soldandbroken.Iwantanewcar
A.7A B.3A C.5A D.1A
A.0.0025 B.0.025 C.0.25 D.2.5
在数字签名技术中,发送者用()将摘要加密与原文一起发送给接收者。A.散列函数
其他标线尺寸的允许误差不超过()。A.±2% B.±3% C.±5%
下列选项中,属于省(自治区.直辖市)工商行政管理局负责本辖区内公司登记的有( )
被称为"十二经之海"的是()A.任脉 B.冲脉 C.督脉 D.带脉
某公司近年来经营业务不断拓展,目前处于成长阶段,预计现有的生产经营能力能够满
患者,女,26岁。夜间急诊入院,表情痛苦,呼吸急促,伴有鼻翼扇动,口唇疱疹,面色
(2017年真题)甲礼花厂2017年6月发生如下业务: (1)委托乙厂加工一批
最新回复
(
0
)