英语Book 2 Unite 3

1、Unit 3 Computers keyboardmouse monitor screen speaker host computer 显示器 What do they have in common? An abacus A calculator A desktop A notebook computer 台式电脑 digital camera a laptop Palmtop =PDA 掌上电脑掌上电脑 Reading: Who am I? Listen to the tape and answer these questions. 2 Who was the first person to

2、 invent the earliest computer? 3 Who was the next important person to design computers? Charles Babbage Alan Turing 1 Who am I? A computer. Scanning 1642 1822 1936 1960s 1970S now The computer began as a calculating machine. The Analytical Machine was built by Charles Babbage. Alan Turing wrote a bo

3、ok to describe how computer could be made. Computer had new transistors and became smaller. Computers were brought into peoples homes. Computers connect people all over the world together. Calculating machine Computer Internet Analytical machine Artificial intelligence Universal machine The developm

4、ent of computers: Can you put them in order ? The development of computers: Calculating machine Analytical machine Universal machine Artificial intelligence Computer Internet Useful phrases calculating machine Analytical machine card with holes technological revolution universal machine artificial i

5、ntelligence go by by internet human race 计算器计算器 分析机分析机 穿孔卡穿孔卡 技术革命技术革命 万能机万能机,通用机器通用机器 人工智能人工智能 走过，过去走过，过去 通过网络通过网络 人类人类 Summary: what have we learned? 1.some words about computers. 2 the development of computers 3 some scientists relating to computers. Advantages and disadvantages of the computers.

6、 Discussion Discussion advantages we can communicate with friends listen to the music see films we_ to each other at an international conference. A are introduced B have been introduced C were introduced D had been introduced 2 Have you ever_ to the exhibition which _ for three weeks? A gone; has be

7、en shown B visited; shown C been; has been on show D went; lasted 3 The boy whom you lent the bike to _ by a car. A hit B be hit C having been hit D was hit 4 I want to buy that kind of cloth because I _ the cloth _ well. A have told; washed B have been told; washes C was told; washed D have been to

8、ld; is washed B C D B 5 The mayor of Beijing says all construction work for the Beijing Olympics_ by 2006. A has been completed B has completed C will have been completed D will have completed 6 The bridge_ away by floods and the fields_ by water. A had been washed ; were covered B has been washing

9、; is covered C had been washed; had covered D has been washed; is covering 7 It has decided that well go on a study trip to London next summer. 8 How long has this book been bought? C A It has been decided How long ago was this book bought? Using structures It has been reported that children will be

10、 off free education. It has been reported that free education will be offered to children. It has been said that we will be offered the latest computer science course book. It has been planned that the latest computer science course book will be offered to us. I have been told by Peter that I will b

11、e lent his notebook computer for a week. I have been told by Peter that his notebook computer will be lent to me for a week. Translat ion 1 This type/kinds of computer has been specially designed for teachers and students. 2 The needs of the teachers and students have been greatly considered. 3 With the help of computer, you may not find it hard to deal with and share information. 4 Besides, you can easily communicate with people all over the world by Internet. 5 This will cost a lot of money, but after all, it is wo