首页
登录
职称英语
[originaltext] Human beings have used tools for a very long time. In some pa
[originaltext] Human beings have used tools for a very long time. In some pa
游客
2024-02-07
24
管理
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 in 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、They made tools with special instruments.
B、They made tools out of wood first.
C、They made tools out of animal skin.
D、They made tools out of stones first.
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3430915.html
相关试题推荐
[originaltext]M:Doyoufeellikegoingtothecinema,Liz?W:Ohyes,let’sdo
[originaltext]W:WelcometoJoe’sHamburgerRestaurant,homeoftheone-pounds
[originaltext]W:WelcometoJoe’sHamburgerRestaurant,homeoftheone-pounds
[originaltext]W:WelcometoJoe’sHamburgerRestaurant,homeoftheone-pounds
[originaltext]W:Johnmusthavebeenjokingwhenhesaidthathewasgoingtoq
[originaltext]W:Johnmusthavebeenjokingwhenhesaidthathewasgoingtoq
[originaltext]W:Johnmusthavebeenjokingwhenhesaidthathewasgoingtoq
[originaltext]W:Johnmusthavebeenjokingwhenhesaidthathewasgoingtoq
[originaltext]W:Johnmusthavebeenjokingwhenhesaidthathewasgoingtoq
[originaltext]W:Lookwhatamessyou’vemade!I’vetoldyouseveraltimes,but
随机试题
[originaltext]Thekinghastakenaknock.NoklawarnedthattheU.S.slowdo
PassageOne[br]Whatistheauthor’sattitudetowardsJamesInhofe’sfamousrem
厚朴中厚朴酚的作用为A.抗菌 B.强心 C.镇痛 D.镇静 E.降血压
一家公司的内部审计主管认为内部审计人员不具备对金融衍生品领域进行审计所必要的技能
男,48岁,2年前因“胃溃疡穿孔”行胃大部分切除术。近5个月常于清晨空腹时出现精
西方货币传导机制理论中,货币学派的货币政策传导机制为M→E→I→Y,其中,E、I
下列有关信息系统审计技术方法的表述,正确的是:A.调查了解信息系统不能采用询问、
下列各句中,加点的成语使用恰当的一项是()。A. B. C. D.
关于税收负担的说法,错误的是()。A.税收的加成使纳税人税收负担加重 B
高压系统短路电流计算时,短路电路中,电阻R计入有效电阻的条件是( )。A.始终
最新回复
(
0
)