首页
登录
职称英语
[originaltext] Human beings have used tools for a very long time. In some part
[originaltext] Human beings have used tools for a very long time. In some part
游客
2024-01-21
35
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. (23) 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. (24) The stone chip was one of the first tools that people used. Some scientists say that it is the key to success of mankind. Since 1960, a new kind of tool has appeared. That 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, (25)but life is changing faster every day.
23. How did early human beings make tools two million years ago?
24. Why is the stone chip thought to be an important tool?
25. What is the future like according to the speaker?
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/3380935.html
相关试题推荐
[originaltext](1)Pupilsinthepoorestcountriesaresufferingfromalack
[originaltext](1)Pupilsinthepoorestcountriesaresufferingfromalack
[originaltext](5)Morethan100000peopleayearinJapanleavetheirjobs
[originaltext]IntheseasidetownofBrightoninsouthernEnglandtherulin
[originaltext](4)FloridaisthestatewhereAmericansandimmigrantschoos
[originaltext]Aforty-year-oldfatheroftwo,SteveVaughttookthefinals
[originaltext]Theworld’srichest10%areresponsibleforhalfofallcarbo
[originaltext]Theworld’srichest10%areresponsibleforhalfofallcarbo
[originaltext]Communitysupportedagriculturefarms,orCSAs,seekpeoplew
[originaltext]Communitysupportedagriculturefarms,orCSAs,seekpeoplew
随机试题
Mostpeoplewhotravellongdistancecomplainofjetlag.Jetlagmakesbusine
Experiencetwogreattheme(主题)parksinonegreatresort(景点)--Disney’sCalif
下列关于校是非的表述,正确的有()。A.目的是发现原稿中的差错 B.功用是纠
在设备工程合同中,完成工程的含义有()。A.通过了竣工试验 B.完成了合同
建设工程采用设计—施工总承包模式的特点有( )。 A、建设单位招标发包工作难
“体语”不包括()。(2009-05)A:身体接触B:社会距离C:装束打扮
对于那些具有外部经济的企业,政府应当采取的政策是()。A.通过征税
根据《招标投标法实施条例》,下列属于评标委员会应当否决投标情形的有()。A.投
发包人财产清单包括( )。A.发包人提供的材料 B.发包人提供的设备设施
在汇总记账凭证账务处理程序下,库存现金日记账和银行存款日记账一般采用()。A、专
最新回复
(
0
)