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
21
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
[originaltext]W:Ican’tseemtowakeupinthemorningwithoutcoffeeatbreak
Researchersareincreasinglyinterestedinmanipulatingtheenvironmentearl
下列哪一项不属于光纤的基本传输特性?()A.色散 B.非线性 C.损耗 D
Linux不支持()文件系统。A.NTFS B.SWAP C.EXT2
路易斯·阿姆斯特朗被称为“爵士乐之父”,对于爵士乐有非常重要的意义。20世纪风靡
证券公司应当依法向社会公开披露的不包括( )。A.证券公司应当依法向社会公开披
制剂的含量测定应首先色谱法,应用率最高的是A.TLC B.UV C.IR
WXH-803A型光纤差动保护对通传输质量的要求是不对称延时小于等于()。1m
为了研究早餐前锻炼和早餐后锻炼对健康的影响,研究人员进行了连续8周的实验,其中,
简述现代企业人力资源管理各个历史发展阶段的特点。
最新回复
(
0
)