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
2023-07-04
113
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 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、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/2807210.html
相关试题推荐
[originaltext]WhenJustinBassettinterviewedforanewjob,heexpectedth
[originaltext]WhenJustinBassettinterviewedforanewjob,heexpectedth
[originaltext]"TheSanFranciscoBayAreaistheplaypenofcounterculture,
[originaltext]"TheSanFranciscoBayAreaistheplaypenofcounterculture,
[originaltext]Sayyougetintobed,preparedforahealthysevenoreighth
[originaltext]Sayyougetintobed,preparedforahealthysevenoreighth
[originaltext]M:Lisa,Lisa!Overhere,darling!It’swonderfultoseeyou.Oh,
[originaltext]W:Goodafternoon,Mr.Jones.IamTeresaChen,andI’llbeinter
[originaltext]M:Idon’tknowwhattodowithTimmy.ThismorningIfoundorang
[originaltext]M:Idon’tknowwhattodowithTimmy.ThismorningIfoundorang
随机试题
LookatthestatementsbelowandatthefiveextractsfromanarticleaboutSwin
Wewereratherupsetbyhis______tosupportourproposals.A、rejectingB、refusing
Wehaveacrisisonourhands.Youmeanglobalwarming?Theworldeconomy?N
具有良好的非线性、动作迅速、残压低。通流容量大,无续流、结构简单、可靠性高、耐污
下列对事业单位属性表述正确的是()A.国家举办 B.以公益为目的 C.从
以下关于或有事项的说法正确的有( )。 Ⅰ.与亏损合同相关的义务不需支付任何
下列不支持艾滋病诊断的是( )。A.口咽念珠菌感染 B.持续发热 C.头痛
根据《国家电网公司变电验收管理规定(试行)》规定,变电站土建设施可研初设审查验收
标准分数是( )。因此,可以做加减运算,而不能做乘除运算A.命名量表 B.顺
下列关于项目建议书的说法,错误的是( )。A.项目建议书,对于政府投资项目是决
最新回复
(
0
)