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1 ．In ancient times，people wrote numbers in many different ways，as these pictures of the number 6 show．在古代，人们用各种各样的方法记录数字，就像这些图片所表示的数字6一样。 *in ancient times意为“在古代”。例：Pepole used wood to cook in ancient times．古代人们用木柴做饭。 ☆辫析：as，like两者都有“像”的意思，但as是连词后跟从句；like是介词后跟名词或代词，例：
Do as I do，照我的样子做。Do it like this．照这样做。
2．This was a very important invention because it made it easier to write big numbers and calculate．
这是一项十分重要的发明，因为它使书写大数目和计算更容易。 ☆because后为原因状语从句。
☆make it easier to do?使做??更容易。例：Today telephones make it easier to talk with each other. 当今电话使人们交谈起来更容易。
3 ．Abacuses are so fast and accurate that people still use them today．
算盘计算很快并且很准确，因此人们至今仍在使用。
☆so?that引导的是结果状语从句，表示结果，意为“如此??以致”。结果状语从句须里于主句之后。例：
The sound was so weak that nobody could hear it．声音如此小，没人能听见。
4 ．Use your own living computer to solve the problem above．用你自己的活电脑来解决上面的问题。 *a living computer一台活电脑。例：The brain is called a living computer．大脑被称作活电脑。 ☆辫析：question，problem两者均可表示“问题”o question多指对不懂的事情提出的问题，往往期待他人给予解答，常与answer连用；problem指客观存在的并有待解决的难题，常与solve连用。例：
She couldn't answer the question．她未能回答这个问题。 We have some problems to solve．我们有些问题需要解决。
5 ．If it is not powerftil enough，you will find the answer on page 59.如果它不够强大，你可以在59页找到答案。
☆if后为条件状语从句，表示“如果??”，主句用一般将来时，从句要用一般现在时。例：
Will you come if he comes here? 如果他来，你会来吗？ 6. \”的不同表达
zero/naught（nought) /nothing/nil
三 重点语段翻译
Numbers：Everyone's language
How many languages do you know? Everyone knows at least two-his or her own language and the international language of numbers． Ancient numbers．
In ancient times，people wrote numbers in many different ways，as these pictures of the number 6 show．However, they nearly all counted in the same way-一一in tens． Zero The system of numbers that nearly everyone uses today consists of the numbers from 1 to 9 and 0（zero)．With these ten numbers，we can write any number from the biggest to the smallest ．The Indians first invented and developed the 1 to 9 system of numbers ．They then invented the zero．This was a very important invention because it made it easier to write big numbers and to calculate． Calculating machines
One of the first calculating machines was an abacus ．Abacuses are so fast and accurate that people still use them today ．On the abacus in the picture，the beads on the wires represent ones，tens，hundreds and thousands，starting from the bottom wire．
The picture on the right shows a modern electronic calculator. It can add，subtract，multiply and divide ．It can also calculate percentages and square roots． This picture shows a computer. Computers are very powerful calculating machines ．In a flash，a computer can do a calculation that you could not do in your whole lifetime． Brain against computer
Some people call the brain a living computer ．Is a human brain a more powerful calculator than a
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computer? The following story may give an answer：
Shakuntala Devi is a lady from India with an amazing brain ．She can calculate like lightning ．In America，Shakuntala and a very powerful computer were given this problem to solve． ☆Find the number that, when it is multiplied 23 times by itself,
*gives.this.answer:9167486769200391580986609275853801624831066801443086 2240712651642793465704086709659327920576748080679002 2783016354924852380335745316935111903596577547340075 681688305620821016129132845546805780158806771
Shakuntala's brain took fifty seconds to find the answer. The computer took a minute．However, before the computer could begin calculating，someone had to program it with instructions，and that took many hours ．No one had to program Shakuntala！
Use your own living computer to solve the problem above ．If it is not powerful enough，you will find the answer on page 59．
数字：每个人的语言
你会多少种语言？每个人至少会两种—他或她的母语和国际数字语言。 古代数字
在古代，人们用各种各样的方法记录数字，就像这些图片所表示的数字6一样。但是，他们几乎都用一种方法数数—十进制。 零
当今几乎每个人都在使用的数字系统由数字1到9和零组成。用这十个数字，我们可以写出从最大到最小的任何一个数字。印度人最早发明并发展了1到9这个数字系统。他们接着又发明了零。这是一项重要的发明，因为它使书写大数目和计算更容易。 计算器
算盘是最早的计算器之一。算盘计茸很快并且很准确，因此人们至今仍在使用。图片中的算盘，从下面开始，杆上的珠子依次代表个位、十位、百位、千位。
右边的图片展示的是一个现代的电子计算器。它能做加、减、乘、除各种运算。它还能算百分数和平方根。 这幅图片展示的是计算机。计算机是非常强大的计算机器。在一瞬间，计算机所做的计算是你一生都做不完的。 大脑对电脑
有些人把大脑叫做活电脑。人的大脑是比电脑还更强大的计算器吗？下面的故事将给出一个答案。
Shakuntala Devi是一个长着令人吃惊的大脑的印度妥人。侧的计算很快。在美国，给Shakuntala和一台很强大的电脑出了一道题。
找出某数的23次平方根，结果为：
．9167486769200391580986609275853801624831066801443086 ．2240712651642793465704086709659327920576748080679002 ．2783016354924852380335745316935111903596577547340075 ．681688305620821016129132845546805780158806771
Shakuntala的大脑花了50秒算出了答案。电脑花了1分钟。然而，电脑在能够计算之前，得有人用指令给它编程序，那要花费几个小时。Shakuntala不需要人给她编程序。
用你自己的活电脑解决上面的问题。如果它不够强大，你可以在59页找到答案。
四语法讲解
1．数字的不同表达
百分数：75 % seventy-five percent 温度： 35? C thirty-five Celsius 基数词：11 eleven 序数词：12th twelfth
小数： 36.16 thirty-six point one six 分数： 4/5 four-fifths
年代： 1987 nineteen eighty-seven
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电话号码：27458116 two seven four five eight double one six 日期： 12/9 December the ninth; the ninth of December 时间： 6:55 six fifty-five; five to seven 其它：Channel 26; No.44 bus; Room 1803 2. 加、减、乘、除的不同表达
陈述句：6 plus 3 is 9； 6 minus 3 is 3； 3 multiplied 6 is 18； 6 divided 3 is 2. 祈使句：Add 3 and 6； Subtract 3 from 6； Multiply 3 by 6. Divide 6 by 3. 3．介词with的用法
a lady with an amazing brain（有）
go for a picnic with my friend（和，与） program it with instructions（按照）
Chapter：5
Look it up！查查看
一 单词汇总
article n．文章 encyclopaedia n．百科全书 describe v. 描绘，描述 fierce add．凶猛的 exist v．存在 harmless adj．无害的 unlike prep不同的 skeleton n．骨',骨
behind adv．在后面，向后面 thinker n．思想家 Greece n．希腊 jar n．坛子
kneel v. 跪下，跪着 even adv．甚至 Disneyland n．迪斯尼乐园 amusement n．娱乐，消遗 the United States of America n．美国 France n．法国
creat v. 创造，创作
character n .（小说、戏剧中的）人物 deliver v. 分发，递送 mail n．邮件 real adj．真实的
while conj．当??的时候，??同时 hurt n．伤害 harm n．伤害
belongings n．所有物，财产 lastly adv．最后 in the end 最后
tame adj .驯服的 look up 查寻，查阅
peacefully adv．和平地，平静地
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die of 因??而死 disease n．疾病 secret n. 秘密
attraction n．吸引，有吸引力的事物 memorial n．纪念碑 republic n．共和国 bury v. 埋葬 hectare n．公项 government n．政府 repair n．修理
pay v．支付，付钱 concrete n. 混凝土 banknote n. 纸币，钞票 ID card 身份证 appear v. 出现 visitor n．参观者
later adv．稍后，之后 dream n．梦
二 重点难点解析
1. millions of成百万的
million（百万），与hundred（百），thousand（千）一样，与具体数字连用，不用复数形式，例：2 million两百万，3 thousand三千，8 hundred八百；表示泛数时，只用复数形式，通常与of连用，例：thousands of成千上万的，hundreds of成百上千的。 2．比较级的表达方式
1）as + adj. /adv．原级＋as = the same + n.＋as +n.“像····一样”
例：Alice is as tall as Helen．= Alice is the same height as Helen．艾莉斯和海伦一样高。 2）adj. /adv．比较级＋than“??比??”
例：They are fiercer than tigers．他们比老虎更残暴。 3. know知道／know about知道关于?
例：Do you know how to swim？你会游泳吗？
I don't know the writer, but I know about her.我不认识这个作家，但我听说过她。 4．辨析：see sb do sth, see sb doing sth ☆see sb do sth意为“看见??做??”，强调动作的全过程；see sb doing sth意为“看见??正在做??”，强调动作正在进行。例：I saw her play the piano，我看见她弹了钢琴。
I saw her pl硕ng the piano．我看见她正在弹钢琴。 5. become even happier变得甚至更开心了
☆even/still, far/much, a bit/a little＋比较级，用来表示比较级的程度。 例：The next day she got up still earlier．第二天她起得更早些。
She sings far/much better than the others．她唱得比别人好得多。 He is a bit/a little tired，他有点儿累了。
三重点语段翻译
Look it up！
May's father bought her an encyclopaedia．Here are three of the articles she found in it． DIIN0SAURS
Dinosaurs lived on earth more than sixty million years ago．This was a long time before people existed. There were millions of dinosaurs ．They lived everywhere．Some were as small as chickens ．Others were as big as ten elephants．Some dinosaurs had wings and could fly． Many dinosaurs were harmless ．They were as gentle as sheep and ate plants ．Others were harmful ．They
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were fiercer than tigers and ate meat, unlike most other dinosaurs． Dinosaurs all died suddenly ．Nobody knows why ．We know about the lives of dinosaurs from the skeletons，eggs and footprints they left behind．（See Earth History) DIOGENES
Diogenes was a famous thinker ．He lived in Greece about two thousand years ago．He taught that the way to be happy was to own as few things as possible ．All he owned was a big jar that he lived in，a coat，a purse and a cup ．He was very happy．One day，he saw a small boy kneeling by a fountain ．The boy was drinking water from his hands．So Diogenes threw away his cup and became even happier. DISNEY，WALT Disneyland is a famous amusement park in the United States of America ．There are also Disneyland Parks in Japan and France ．Disneyland Park was created by Walt Disney（1901－1966），who is famous for his cartoon characters：Mickey Mouse，Donald Duck，Goofy，Snow White and many others． Walt was born in the USA．After leaving school and studying art at night, he sold newspapers and delivered mail．Finally he got a job that he really liked-drawing cartoons for films．
Walt's most famous cartoon character, Mickey Mouse，was a real mouse．It sometimes sat on Walt's desk while he was working．Walt drew山e mouse and put it in a cartoon．Soon Mickey became a star and Walt became rich and famous．（See Cartoons）
查查看！
梅的爸爸给她买了一部百科全书。这是她在书中看到的三篇文章。 恐龙
恐龙在六千多万年前生活在地球上。这是有人类存在前的很长一段时间。当时有上百万只恐龙。它们无处不在。一些恐龙像鸡一样小。其它的像十头大象一样大。一些恐龙有翅膀，可以飞。
许多恐龙都是无害的。它们像羊一样温顺，吃草。有些恐龙是有害的。它们比老虎更残暴，吃肉，不像其它大部分恐龙那样。
恐龙突然灭亡。没有人知道原因。我们是从恐龙留下的骸骨、恐龙蛋和脚印中知道关于它们的存在的。（见地球的历史）
Diogenes是位著名的思想家。他大约于两千年前居住在希腊。他认为快乐的方法就是拥有尽可能少的东西。他所拥有的全部就是一个他所栖身的大罐子，一件衣服，一个钱包和一个杯子。他非常快乐。一天，他看见一个小男孩正跪在喷泉旁。他正用手喝水。因此，Diogenes扔掉了他的杯子，变得甚至更快乐了。 迪斯尼，沃尔特
迪斯尼乐园是美国著名的游乐园。在日本和法国也有迪斯尼主题公园。迪斯尼乐园是由沃尔特·迪斯尼创建的，他以他的卡通人物而闻名，像米老鼠、唐老鸭、白雪公主和许多其他角色。
沃尔特生于美国。毕业后，他又在晚上学画画，他开始卖报纸，送邮件。最后他得到了一份自己真正喜爱的工作—为电影画卡通漫画。
沃尔特最著名的卡通人物，米老鼠，是一只真实的老鼠。它有时在沃尔特正在工作的时候坐到他的桌子上。沃尔特把它画了下来，放到一部卡通里。不久米老鼠就成了明星，沃尔特变得富有而著名。（见卡通）
四语法讲解
I．指示代词（this, that, these, those)
指示代词有单、复数之分。特指名词的单数用this（近）/that（远）；特指名词的复数用these（近）/those（远）。Is this your book? Yes，it is．Is that your bike? No，it isn't。
Are these your pencils? Yes，they are．Are those your parents? No，they aren't． 2．可数名词和不可数名词
普通名词按其所表现的性质可分为可数名词和不可数名词。不可数名词一般只有单数形式，通常以量词短语来表
示它们的量。可数名词有复数形式，可数名词复数形式的构成方法如下： 情况 一般情况 构成方法 +s 读音 轻辅音后/s/； 浊辅音后/z/， ts读/ts/；ds读/dz/ 例词 book-books day-days；rat-rats card-cards 15 六十铺中小学教育网（http://www.lspjy.com)，上万资源免费下载无需注册！分站www.fydaxue.com