首页
登录
职称英语
What is the main idea of this passage? [br] [originaltext] About one million
What is the main idea of this passage? [br] [originaltext] About one million
游客
2023-11-02
9
管理
问题
What is the main idea of this passage? [br]
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、Great glaciers are very destructive.
B、All glaciers move southward.
C、The Mississippi-Missouri-Ohio system is larger than it was before the Ice Age.
D、The Great Lakes are now smaller than they were before the Ice Age.
答案
A
解析
细节题。文中说到当那些巨大的冰川滑动过程中会推倒挡住前进道路的大树,并带走地面上的泥土,故A项是正确的。
转载请注明原文地址:https://www.tihaiku.com/zcyy/3150645.html
相关试题推荐
Britainhasannouncedthatitistocancelabout200millionpounds’wortho
Britainhasannouncedthatitistocancelabout200millionpounds’wortho
Britainhasannouncedthatitistocancelabout200millionpounds’wortho
Britainhasannouncedthatitistocancelabout200millionpounds’wortho
HowlongdidEthbellteachminoritystudents?[br][originaltext]Afterreti
HowlongdidEthbellteachminoritystudents?[br][originaltext]Afterreti
HowlongdidEthbellteachminoritystudents?[br][originaltext]Afterreti
HowlongdidEthbellteachminoritystudents?[originaltext]Afterretiringf
ThespeakercomparestheInternetto[br][originaltext]TheInternetisag
ThespeakercomparestheInternetto[br][originaltext]TheInternetisag
随机试题
[originaltext]M:Hey,Linda!Longtimenosee!Iheardthatyou’regoingonab
Thelightturnsgreenandthepersoninfrontofyoudoesn’tsteponthegas.
Jazzbeganintheearly20thcenturyasakindofmusicofblackAmericans.
胡应麟把辨别伪书的方法归总为()。A.七点 B.八点 C.九点 D.十点
中国进入旧民主主义革命时期的重要标志是()。A.太平天国农民运动 B.鸦片战
一个成年人不能对细胞内寄生菌或真菌产生抗感染免疫提示可能的原因是A.补体缺陷
对于养护等级为2级的隧道,其经常性检查的频率应为1次/2月。()
利润表的作用不包括( )。A.反映企业一定会计期间生产经营活动的成果 B.评
求助者:一对夫妇,均是公务员,为儿子前来咨询。 案例介绍:儿子15岁,初中三年
A.HMGCOA合成酶 B.己糖激酶 C.乙酰COA羧化酶 D.琥珀酰CO
最新回复
(
0
)