英语九年级上册Unit 4 Amazing ScienceTopic 3 China is the third nation that sent a person into space.公开课ppt课

这是一份英语九年级上册Unit 4 Amazing ScienceTopic 3 China is the third nation that sent a person into space.公开课ppt课件，共25页。PPT课件主要包含了We learn，We can等内容，欢迎下载使用。
1. Sme wrds: dubt, tiny, inside, brain,cancel, cnnect 2. Sme phrases: n dubt, fr instance 3. Sme sentences:(1) There is n dubt that cmputers are very useful in technlgy and business(2) Cmputers help us at wrk and at hme, but they must be used prperly.
What are the cmputers used fr?
Cmputers were invented in the USA in the 1950s, nw they have becme very imprtant in many areas f wrk and leisure.
Dctrs can find diseases easily with the help f cmputers.
Fr example, tiny cmputers which are inside patients' bdies can keep their hearts beating nrmally.
In space, cmputers have been used t cntrl the speed and directin f a spaceship.
1a Read and understand. 1. Tick the fields we use the cmputer in.
educatin business industry cmmunicatin daily life medical care entertainment sprts
1a Read and understand.2. Can yu give an example f the use f the cmputer in ne f the fields abve?
The Imprtance f Cmputers Since cmputers were invented in the USA in the 1950s, they have becme very imprtant in many areas f wrk and leisure.There is n dubt that cmputers are very useful in technlgy and business. In space, cmputers have been used t cntrl the speed and directin f a spaceship.With the help f cmputers, dctrs can find diseases easily and slve ther prblems.Fr example, tiny cmputers which are inside patients' bdies can keep their hearts beating nrmally. In factries, rbts are cntrlled by cmputers that are like human brains. They can d wrk that is dangerus t humans. In business, cmputers are used t place and cancel rders. They are als making the wrkplace safer and better.
Since the Internet came int being, peple's lives at hme have changed, t. Mre and mre peple have persnal cmputers that are used t play games and watch mvies. Thanks t the Internet, peple can d shpping and d business at hme. Instead f writing letters n paper, peple cmmunicate by sending e-mails and chatting n line. The whle wrld is cnnected. The Internet is making the wrld smaller, like a village.
Cmputers have imprved ur lives, but they have brught prblems, t. Fr instance, if we wrk n cmputers t lng, we may get headaches r sre eyes. If we play cmputer games t much, we wn't have enugh time t study r exercise. Besides, nt everything we read n the Internet is true r gd fr us. Cmputers help us at wrk and at hme, but they must be used prperly.
There is n dubt that we will be successful.
I dn't dubt that they will be able t slve the prblems.
dubt n. & v. 怀疑，疑惑
(2)dubt (vt.)+ 从句
(3)dubt (vi.)+ abut / f
Dubt is the key t knwledge.
There is n reasn t dubt f his hnesty.
I dubt whether/if he'll change his mind.
(1)dubt (n.)
1.There is n dubt that cmputers are very useful in technlgy and business.毫无疑问电脑在技术和贸易业都非常有用。
2.Fr example , tiny cmputers which are inside patients’ bdies can keep their hearts beating nrmally. 例如，病人体内植入微电脑能帮助病人的心脏正常搏动。
tiny very small in size adj. 极小的，微小的
a tiny girl
3.The whle wrld is cnnected. 网络连接了全世界。
cnnect v. 连接 cnnectin n. 关系，联系
1.cnnect A with B 使A与B连接
2.cnnect sth. (t sth.) 使电、气、水等接通
3.cnnect sb./sth. (with sb./sth.) 与……有联系，把……联系起来
4. Fr instance, if we wrk n cmputers t lng, we may get headaches r sre eyes.比如：如果我们使用的电脑工作的时间太长，我们就会头昏眼花。fr instance =fr example 用来举例说明某一论点或情况，一般只举同类人或物中的“一个”为例。such as 用来列举事物时，一般列举同类人或事物中的几个例子。 E.g. （1）Many cuntries, Japan, fr instance (fr example),has a lt f earthquakes. （2）I like fruits, such as apples, pears and bananas.
5. Besides, nt everything we read n the Internet is true r gd fr us.另外，我们在网上看到的东西并不都是真实的、有益的。
(1)besides与except用于肯定句时，except意为“除……之外（不再有）”；besides意为“除……之外（还有）”。 eg: I have anther blue pen besides this ne. 除了这支外，我还有另一支蓝色钢笔。（1+1，共2支） We all passed the exam except Tm. 我们都通过了考试，汤姆除外。（整体中……汤姆一人不及格）
(2)except前几乎总有all、any、every、n及其复合词等词。eg：He answered all the questins except the last ne. 除了最后一个问题没答外，其余问题他都答了。(3)except后接名词、代词、动名词和动词原形，这时except=but； 但except后跟副词、介词短语时，不能用but代替。eg：The windw is never pen except in summer. 这扇窗户从来不开，除夏季外。 He did nthing except/ but clean the huse. 他只是打扫了房子。
1b Read 1a and cmplete the fllwing taskes.1. Underline the tpic sentence f each the fllwing diagram.
1.____________________________ f a spaceship2.help dctrs _____________________________ 3._______________________________ in factries4.help businessmen _____________________
1.play games and __________________________ 2._______________ and _____________ at hme 3.___________________ by sending e-mails and _______________________________
1.get headaches r _____________________2.dn’t have enugh time __________________3.smething n Internet is nt ________________
cntrl the speed and directin
find diseases easily
cntrl the rbts
place and cancel rders
watch mvies
cmmunicate
chatting nline
t study r exercise
Write a shrt passage with the title with One Day Withut Cmputers. The fllwing infrmatin may help yu. Suppse yu were n a special day in 2030. During the day, there were n cmputers in the wrld. What truble wuld yu have? Yu may begin like this:
One Day Withut Cmputers Tday, when I gt up, I just turned n the cmputer as usual, but it didn’t wrk. Then I tried my brther’s PC, my parents’, even my dg’s, but nne f them wrked. Later, it was reprted n TV that all f the cmputers in the wrld brke dwn tday…
One Day Withut Cmputers Tday, when I gt up, I just turned n the cmputer as usual, but it didn’t wrk. Then I tried my brther’s PC, my parents’, even my dg’s, but nne f them wrked. Later, it was reprted n TV that all f the cmputers in the wrld brke dwn tday. S the wrld is quite different. Fr instance, we can’t play games, watch mvies r d shpping at hme. Besides, we can’t cmmunicate by sending e-mails r chatting nline. Withut the help f cmputers, businessmen can’t place r cancel rders nline. Teachers can’t give lessns t their students. What’s wrse, rbts cntrlled by cmputers can’t d dangerus wrk fr humans. Even the dctrs can’t find the diseases easily. In shrt, we almst have truble with everything withut cmputers tday.
1. Talk abut the imprtance f cmputers. 2. Write a cmpsitin by using ur imaginatin.
1. I like the by .The by always help thers. I like the by __________________always helps thers.2. Shenzhu X is a spaceship . It was launched with three astrnauts in 2013. Shenzhu X is a spaceship _______________was launched with three astrnauts in 2013. 3.China is a great cuntry. China has abut 5000 years f histry. China is a great cuntry_________ has abut 5000 years f histry. 4. In factries, rbts are cntrlled by cmputers. Rbts are cntrlled by cmputers are like human brains. In factries, rbts are cntrlled by cmputers________________ are like human brains.
prperly, besides, brught, get, enugh
Cmputers have imprved ur lives, but they have _______prblems, t. Fr instance, if we wrk n cmputers t lng, we may _____ headaches r sre eyes. If we play cmputer games t much, we wn’t have ______ time t study r exercise. ______ , nt everything we read n the Internet is true r gd fr us. Cmputers help us at wrk and at hme, but they must be used _______.