Unit4Topic3SectionC

1、unit 4 amazing sciencetopic 3 china is the third nation that sent a person into space. section cwhat are the computers used for?1a 1. tick the fields we use the computer in. education business industry communication daily life medical care entertainment sports doctors can find diseases easily with t

2、he help of computers. can you give an example of the use of the computer in one of the fields above? in space, computers have been used to control the speed and direction of a spaceship. what is the passage about ?the importance of computersunderline the topic sentence of each paragraph. 1. since co

3、mputers were invented in the usa in the 1950s, they have become very important in many areas of work and leisure. 2. since the internet came into being, peoples lives at home have been changed, too. 3. computers have improved our lives, but they have brought problems, too. place the usage of compute

4、rsin spacein hospitalsin factoriesin business control the speed and directionfind diseases easily and solve other problemsdo dangerous workused to place and cancel orders there is no doubt that we will be successful. i dont doubt that they will be able to solve the problems.doubtn. & v.懷疑，疑惑懷疑，疑

5、惑(2)doubt (vt.)+ 從句(3)doubt (vi.)+ about / ofdoubt is the key to knowledge.there is no reason to doubt of his honesty.i doubt whether/if hell change his mind. (1)doubt (n.) 1.there is no doubt that computers are very useful in technology and business.毫無(wú)疑問(wèn)電腦在技術(shù)和貿(mào)易業(yè)都非常有用。毫無(wú)疑問(wèn)電腦在技術(shù)和貿(mào)易業(yè)都非常有用。 2.for exam

6、ple , tiny computers which are inside patients bodies can keep their hearts beating normally.例如，病人體內(nèi)植入微電腦能幫助病人例如，病人體內(nèi)植入微電腦能幫助病人的心臟正常搏動(dòng)。的心臟正常搏動(dòng)。 64英寸英寸 超大型（超大型（huge）32英寸英寸 大型（大型（large）16英寸英寸 中型（中型（medium）8英寸英寸 小型（小型（small）4英寸英寸 超小型（超小型（tiny）tiny very small in size adj. 極小的，微小的a tiny girlprep.在內(nèi)adv.在里

7、面language points 3.the whole world is connected.網(wǎng)絡(luò)連接了全網(wǎng)絡(luò)連接了全世界世界。 connect v. 連接connection n. 關(guān)系，聯(lián)系1.connect a with b 使a與b連接2.connect sth. (to sth.) 使電、氣、水等接通3.connect sb./sth. (with sb./sth.) 與有聯(lián)系，把聯(lián)系起來(lái) come into being more and more watch movies thanks to do business instead of chat online make the

8、world smaller 做買賣做買賣 形成，產(chǎn)生形成，產(chǎn)生 越來(lái)越多越來(lái)越多 看電影看電影 代替代替 網(wǎng)上聊天網(wǎng)上聊天 使世界更小使世界更小 多虧，由于多虧，由于1. for instance, if we work on computers too long, we may get headaches or sore eyes.比如：比如：如果我們使用的電腦工作的時(shí)間太長(zhǎng)，我們就會(huì)頭昏眼花。如果我們使用的電腦工作的時(shí)間太長(zhǎng)，我們就會(huì)頭昏眼花。 for instance =for example 用來(lái)舉例說(shuō)明某一論點(diǎn)或情用來(lái)舉例說(shuō)明某一論點(diǎn)或情況，一般只舉同類人或物中的況，一般只舉同類人或

9、物中的“一個(gè)一個(gè)”為例。為例。 such as 用來(lái)列舉事物時(shí)，一般列舉同類人或事物中的幾用來(lái)列舉事物時(shí)，一般列舉同類人或事物中的幾個(gè)例子。個(gè)例子。 e.g. （1）many countries, japan, for instance (for example), has a lot of earthquakes. （2）i like fruits, such as apples, pears and bananas. (1)besides與與except用于肯定句時(shí)，用于肯定句時(shí)，except意為意為“除除之外（不之外（不 再有）再有）”；besides意為意為“除除之外（還有）之外（還有

10、）”。 如：如： i have another blue pen besides this one.除了這支外，我還有另一支藍(lán)色鋼筆。（除了這支外，我還有另一支藍(lán)色鋼筆。（1+1，共，共2支）支）we all passed the exam except tom.我們都通過(guò)了考試，湯姆除外。（整體中我們都通過(guò)了考試，湯姆除外。（整體中湯姆一人不及格）湯姆一人不及格）(2)except前幾乎總有前幾乎總有all、any、every、no及其復(fù)合詞等詞。及其復(fù)合詞等詞。如：如：he answered all the questions except the last one.除了最后一個(gè)問(wèn)題沒(méi)答外

11、，其余問(wèn)題他都答了。除了最后一個(gè)問(wèn)題沒(méi)答外，其余問(wèn)題他都答了。(3)except后接名詞、代詞、動(dòng)名詞和動(dòng)詞原形，這時(shí)后接名詞、代詞、動(dòng)名詞和動(dòng)詞原形，這時(shí)except=but；但但except后跟副詞、介詞短語(yǔ)時(shí)，不能用后跟副詞、介詞短語(yǔ)時(shí)，不能用but代替。代替。如：如：the window is never open except in summer. 這扇窗戶從來(lái)不開(kāi)，除夏季外。這扇窗戶從來(lái)不開(kāi)，除夏季外。he did nothing except/ but clean the house. 他只是打掃了房子。他只是打掃了房子。 2. besides, not everything w

12、e read on the internet is true or good for us.另外，我們?cè)诰W(wǎng)上看到的東西并不都是真實(shí)的、有益的。另外，我們?cè)诰W(wǎng)上看到的東西并不都是真實(shí)的、有益的。 1b 2. complete the following diagram. computers usageproblemwork daily life1. _ of a spaceship. 2. help doctors _. 3. _ in factories. 4. help businessmen _.1. play games and _. 2. _ and _ at home. 3. _ b

13、y sending e-mails and _. 1. get headaches or _. 2. dont have enough time _. 3. something on internet is not _.control the speed and direction find diseases easilycontrol the robotsplace and cancel orders watch movies do shopping do businesscommunicate chatting online sore eyesto study or exercise tr

14、ue or goodproperly, besides, brought, get, enough computers have improved our lives, but they have _problems, too. for instance, if we work on computers too long, we may _ headaches or sore eyes. if we play computer games too much, we wont have _ time to study or exercise. _ , not everything we read

15、 on the internet is true or good for us. computers help us at work and at home, but they must be used _. broughtgetenoughbesidesproperly2 write a short passage with the title with one day without computers. the following information may help you. suppose you were on a special day in 2030. during the

16、 day, there were no computers in the world. what trouble would you have? you may begin like this: one day without computers today, when i got up, i just turned on the computer as usual, but it didnt work. then i tried my brothers pc, my parents, even my dogs, but none of them worked. later, it was r

17、eported on tv that all of the computers in the world broke down today one day without computers today, when i got up, i just turned on the computer as usual, but it didnt work. then i tried my brothers pc, my parents, even my dogs, but none of them worked. later, it was reported on tv that all of th

18、e computers in the world broke down today. so the world is quite different. for instance, we cant play games, watch movies or do shopping at home. besides, we cant communicate by sending e-mails or chatting online. without the help of computers, businessmen cant place or cancel orders online. teachers cant give lessons to their students. whats worse, robots controlled by computers cant do dangerous work for humans. even the doctors cant find the diseases easily. in short, we almost have trouble with e