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
2023-11-12
57
管理
问题
What is the main idea of this passage? [br]
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、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
转载请注明原文地址:https://tihaiku.com/zcyy/3181485.html
相关试题推荐
Whatisthegrowingdangerinairtravelaccordingtothispassage?[br][origi
Whatisthegrowingdangerinairtravelaccordingtothispassage?[br][origi
Whendidtheworld’spopulationreachsixbillion?[br][originaltext]F:Profes
Whendidtheworld’spopulationreachsixbillion?[originaltext]F:ProfessorLe
Whydoesthestudentsaythatit’scomplicatedandembarrassing?[originaltext]M
Therescueeffortsconcentratedmainlyon[br][originaltext]Canadianpolic
Therescueeffortsconcentratedmainlyon[originaltext]Canadianpoliceand
Whatisthisnewsitemmainlyabout[originaltext]SomeHotmailusersarerep
Accordingtothepassage,"scheduling"meansthatyou[br][originaltext]Li
Accordingtothepassage,newwordstendtocomefrom[br][originaltext]Ne
随机试题
Whenaninventionismade,theinventorhasthreepossiblecoursesofaction
Ithasbeenproposedthatwe_____ourdecisionuntilthenextmeeting.A、delayedB
Howmanydifferentkindsofemotionsdoyoufeel?Youmaybesurprisedtofi
Labelthemapbelow.Writethecorrectletter,A-l,nexttoQuestions14-20.[im
Theauthorreferstotheoceanbottomasa"frontier"inParagraph1becauseit
Onlylater____________(他们才意识到)whataterriblethingitwas.didtheyrealize
为遵守国家有关环保法律的规定,2017年1月31日,甲公司对A生产设备进行停工改
下列关于贷款抵押风险分析,正确的是()。A.抵押权建立的前提是抵押物必须实际
影响酶促反应的因素有()。A.温度,pH值 B.作用物浓度 C.激动剂
单位内部的会计工作管理由()负责。A、财务处处长 B、单位负责人 C、主管会
最新回复
(
0
)