首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
A、Stone chips have been used for thousands of years. B、Silicon chips have been used for hundreds of years. C、Stone chips have ch
A、Stone chips have been used for thousands of years. B、Silicon chips have been used for hundreds of years. C、Stone chips have ch
admin
2015-05-28
39
问题
Human beings have used tools for a very long time. In some parts of the world you can still find tools that people used more than two million years ago.
They made these tools by hitting one stone against another. In this way, they broke off pieces from one of the stones. These chips of stone were usually sharp on one side. People used them for cutting meat and skin from dead animals, and also for making other tools out of wood. Tools helped people to get food more easily.
Working with tools also helped to develop human intelligence. The human brain grew bigger, and human beings began to invent more and more tools and machines. The stone chip was one of the first tools that people used. Some scientists say that it was the key to success of mankind.
Since 1960, a new kind of tool has appeared. This is the silicon chip-a little chip of silicon crystal. It is smaller than a fingernail, but it can store more than a million "bits" of information. It is an electronic brain. Every year these chips get cleverer, but their size gets smaller, and their cost gets less.
They are used in watches, calculators and intelligent machines that we can use in many ways. In the future we will not need to work with tools in the old way. Human beings used stone chips for more than two million years, but human life changed very little at that time. We have used silicon chips for only a few years, but life is changing faster every day.
23.How did early human beings make tools two million years ago?
24.What’s the difference between the stone chips and the silicon chips?
25.What is the passage mainly about?
选项
A、Stone chips have been used for thousands of years.
B、Silicon chips have been used for hundreds of years.
C、Stone chips have changed people’s life dramatically.
D、Silicon chips have changed people’s life dramatically.
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/EXl7777K
0
大学英语四级
相关试题推荐
HowStressedParentsAffectTheirKidsA)Whenitcomestofindingculpritsforeverythingthat’swrongwithusaschildrenande
HowStressedParentsAffectTheirKidsA)Whenitcomestofindingculpritsforeverythingthat’swrongwithusaschildrenande
Disappointment,asuncomfortableandevenpainfulasitcanbeforus,isessentialandimportantonourjourneyofgrowth.Maki
Giventhelackoffitbetweengiftedstudentsandtheirschools,itisnotsurprisingthatsuchstudentsoftenhavelittlegood
IsCollegeaWorthyInvestment?A)Whyarewespendingsomuchmoneyoncollege?Andwhyarewesounhappyaboutit?Weallseem
A、Theassignmentlookseasybutactuallyit’squitedifficult.B、Theassignmentistoodifficultforthemtocompleteontime.C
A、Shiftthephonetothetechnicaldepartment.B、Helpthemanrepairthecomputeroverthephone.C、Teachthemanhowtoconnect
A、TheEgyptianalphabet.B、TheGreekalphabet.C、TheRomanalphabet.D、TheMediterraneanalphabet.C
Thethousandsofpeopleforcedtoabandontheirhomesinrecentweekstofloodwatersarevictimsnotjustofnaturebutofhuman
A、Shecan’tfindit.B、Shewillfixitrightnow.C、Sheasksthemantosewit.D、Sheforgetswhereitis.B
随机试题
培养箱的操作方法与维护
下列选项中,属于消化性溃疡复发危险因素的有
某胃溃疡患者,近月来腹痛节律性消失,消瘦,大便隐血试验持续阳性,应考虑为()。
下列关于英国法的表述,错误的是:
根据《建设工程勘察设计管理条例》的规定,编辑初步设计文件应当()。
近代“岭南派”的代表画家有()。
关于不服地方各级人民法院第一审的判决、裁定而提出上诉的,须由被害人提出。()
为了更好地适应新时期公安队伍建设的需要,健全公安队伍的内务制度,公安部根据《人民警察法》的规定,于()颁布实施《公安机关人民警察内务条令》。为公安队伍的内务建设提供了法律依据和保障。
中国古代在“室”内举办宴会,座位以西为尊,北次之,南再次之,东最次,按“上北下南,左西右东”的方向,下列宴会座位安排符合礼法的是()。
使用Outlook邮件客户端软件创建邮件帐户时,发送邮件服务器类型通常是()。
最新回复
(
0
)