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
2023-07-06
46
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、An introduction to two kinds of tools.
B、The origin of the silicon chips.
C、The way ancient people made tools.
D、The changes brought about by tools.
答案
A
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2814651.html
相关试题推荐
[originaltext]AstheMid-AutumnFestivalandNationalDayholidaysareonly
[originaltext]Cashorcard?It’saquestionweallfaceatthesupermarket
[originaltext]Therearemanytheoriesaboutthebeginningofdramainancie
[originaltext]Therearemanytheoriesaboutthebeginningofdramainancie
[originaltext]W:Hey,what’sthenews?(12)Youlooksohappy.M:Really?W:Come
[originaltext]W:Hey,what’sthenews?(12)Youlooksohappy.M:Really?W:Come
[originaltext]W:Hey,what’sthenews?(12)Youlooksohappy.M:Really?W:Come
[originaltext]M:(9)Isthistheworkshoptoprepareforaninterview?Iamtryin
[originaltext]W:Ifitishottomorrow,wemaygiveuptheideaofplayingtenn
[originaltext]W:Ifitishottomorrow,wemaygiveuptheideaofplayingtenn
随机试题
DealingwithLifeAbroadI.Cultureshockoflifeabroad1)Moreandmorepeople
ThelibraryofcongressinWashington,D.C.,which【C1】______thelargestco
YouhavejustreceivedaletterfromyourfriendTom,whotoldyouthatheh
[originaltext]TelephonebooksintheUnitedStateshavewhite,blueandyel
GreekMythologyGreekmythologyconcernstheanci
商品经济产生的条件是()。A.社会分工 B.生产资料和产品归不同的所有者所有
下面说法正确的是()。 A.该工艺流程体现了绿色化学思想 B. C. D
下列关于施工成本控制中获得成本信息的说法,正确的是()。A、通过工程承包合同获取
采用四氯化汞钾—盐酸副玫瑰苯胺光度法测定某采样点大气中SO2时,用装有5mL吸收
(2020年真题)阿司匹林的代谢产物中含有葡萄糖醛酸结合物,该代谢类型属于A.弱
最新回复
(
0
)