1、2014-2015 学年高中英语同步教案：Unit 3 Computer 第 2-3 课时（人教新课标必修 2）Period2-3 Pre-reading the instructions are the program or software. Depending upon size, computers are called mainframes, minicomputers, and microcomputers. Microcomputers include desk-top and portable personal computers. A multi-function elect
2、ronic device that can execute instructions to perform a task. A device that accepts information, processes it, and supplies an output. A computer usually contains memory, a control unit, arithmetic and logical units, and a means for input and output. a programmable hardware component that is control
3、led by internally stored programs and that can perform substantial computations (including arithmetic and logic operations) without human intervention. A computer typically consists of one or more processing units, memory units, and associated peripheral input and output devices. Related to automati
4、on and electronic data processing. The Library of Congress commonly classes most computer-related books in HF5548, QA75-76, Z52, T385, and some TK ranges. a machine for performing calculations automatically calculator: an expert at calculation (or at operating calculating machines) A computer is a d
5、evice or machine for making calculations or controlling operations that are expressible in numerical or logical terms. Computers are constructed from components that perform simple well-defined functions. The complex interactions of these components endow computers with the ability to process inform
6、ation. If correctly configured (usually by, programming) a computer can be made to represent some aspect of a problem or part of a system. If a computer configured in this way is give 2. Discussing and sharing How have computers changed our lives? Someday soon, if you havent already, youre likely to
7、 plug into the computer network nation growing in our midst. Computer terminals, or small computers connected via modem (a modulator/demodulator circuit for encoding/decoding computer chatter) to ordinary telephone lines, should be as ubiquitous as the telephone itself. Theyre a much more useful and
8、 humane tool than the phone, and with corporate America behind them the networks will be everywhere-changing our lives more than any technology since the automobile. Joining a computer network is the same as joining a community. Small systems are like villages, where new members are formally welcome
9、d. The larger networks, the Source and CompuServe, for example, are cities-anonymous, full of life and events, but difficult to fit into. II. Reading This is the purpose of the reading and so it is important that the students learn to use all the clues in the text to help them understand the gist of
10、 what they are readingSo encourage them to look at the pictures and the heading and guess what the text might be aboutThen ask the class to read the passage silentlyMake sure the students have the chronology of the development of computers in their mindsAsk them: 1. Listening and reading to the reco
11、rding of the text WHO AM I? Turn to page 18 and listen and read to the recording of the text. Pay attention to the pauses, pronunciation and intonation of the native reader. 2. Reading aloud and underlining expressions Now we are to read the text once again and underline all the expressions in the t
12、ext. Put them down into your notebook after class as homework. Collocations from WHO AM I? begin as, a calculating machine, be built as, follow instructions from, sound simple, at the time, a technological revolution, write a book, makework, solve problems, become huge, had artificial intelligence,
13、go back to, the size of, go by, change size, become small and thin, get quick, stand there by oneself, be connected by, share information by, talk to, bringinto, deal with, communicate with, serve the human race 3. Reading, identifying and settling Attention, please! It is time to skim the text one
14、more time and identify the difficult sentences. Try analyzing the structures of the difficult sentences and discuss them among your group members. You may also put your questions to me for help. Chat （ online）（在线）聊天 To chat is to talk about ordinary things that are not very important. You can chat t
15、o one person or to many people. People also use this word now for parts of the Internet where we can talk with many different people at the same time. Usually, you chat on the internet in a chat room or messaging service like AOL(American On-Line) Instant Messenger (AIM), Yahoo Messenger, or MSN Mes
16、senger. IV. Closing down by doing comprehending exercises Turn to page 18 and in pairs do the comprehending exercises No. 1 and 2. Reading and transferring Scan the text for information to complete the table below, describing the development of computer. In 1642 In 1822 In 1936 In 1960s In 1970s Ans
17、wer key: 1642: The computer began as a calculating machine1822: The Analytical Machine was made by Charles Babbage1936: Alan Turing wrote a book to describe how computers could be made to work1960s: Computers had new transistors and became smaller1960s: The first family of computers connected to eac
18、h other1970s: Computers were brought into peoples homesNow: Computers connect people all over the world together V.Explanation1in common: for or by all of a group 共同的；共有的；共用的。in common 常常同 have 连用，如：have nothing in common 无共同之处have little in common 几乎无共同之处have something in common 有一些共同之处have a lot i
19、n common 有许多共同之处（1）You know, Dorothy, you and I have one thing in common（2）We just had nothing in common and I couldnt communicate with his dull business friends（3）I suddenly felt we had a lot in common2simple-minded: showing very little intelligence 头脑简单的；笨的。Richard is smart but he has a lot of sim
20、ple-minded friendssimple-minded 是一个复合形容词，与它结构相同的复合形容词还有：absent-minded 心不在焉的 open-minded 虚心的，没有偏见的narrow-minded 心胸狭窄的 single-minded 一心一意的strong-minded 意志坚强的 weak-minded 低能的，愚蠢的3make a decision: make up ones mind 作出决定。与 make a decision 意思相近的词组有：arrive at / come to / reach a decision。与 make 连用的常用词组有：ma
21、ke an attempt, make an effort, make an offer, make a suggestion, make a phone call, make a mistake, make progress 等。4in a way: to a certain extent 在某种程度上。与 in a way 同义的词组有 in one way 和 in some ways。容易与之混淆的词组是 in the way 意为“造成阻碍”，请比较：In a way, I like this new textbook very much从某种程度上说，Im afraid your
22、bike is in the way看来你的自行车挡着道了。5after all1）in spite of what has been said, done or expected 毕竟；终究；归根结底。So youve come after all! 你终究还是来了！After all, what does it matter? 归根结底，那又有什么关系呢？2）it should be remembered 别忘了。She should have offered to pay shes a millionaire, after all6watch over: take care of 照料；
23、照管。Could you watch over my dog while I am on holiday? You go swimming, pleaseIll watch over the clothes here7wander（v.）: to move around in an area or go from place to place without any special purpose; roam 游荡；闲逛。He was wandering aimlessly up and down the roadHomework: Preview The Present Perfect Passive Voice
