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 & Reading Pre-reading This can be a continuation of the Warming UpLet the students discuss the questions set out in the Students Book1. Questioning and answering What do you know about computer? Electronic machine capable of pe
2、rforming calculations and other manipulations of various types of data, under the control of a stored set of instructions. The machine itself is the hardware; the instructions are the program or software. Depending upon size, computers are called mainframes, minicomputers, and microcomputers. Microc
3、omputers include desk-top and portable personal computers. A multi-function electronic 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, an
4、d a means for input and output. a programmable hardware component that is controlled 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, memo
5、ry units, and associated peripheral input and output devices. Related to automation 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:
6、an expert at calculation (or at operating calculating machines) A computer is a device 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 in
7、teractions of these components endow computers with the ability to process information. 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
8、computers changed our lives? Someday soon, if you havent already, youre likely to 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 line
9、s, should be as ubiquitous as the telephone itself. Theyre a much more useful and 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 c
10、ommunity. Small systems are like villages, where new members are formally welcomed. 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 st
11、udents learn to use all the clues in the text to help them understand the gist of 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 deve
12、lopment of computers in their mindsAsk them: 1. Listening and reading to the recording 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
13、Now we are to read the text once again and underline all the expressions in the text. 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, w
14、rite a book, makework, solve problems, become huge, had artificial intelligence, 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. Read
15、ing, identifying and settling Attention, please! It is time to skim the text one 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 c
16、hat is to talk about ordinary things that are not very important. You can chat to 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
17、 like AOL(American On-Line) Instant Messenger (AIM), Yahoo Messenger, or MSN Messenger. 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, descr
18、ibing the development of computer. In 1642 In 1822 In 1936 In 1960s In 1970s Answer key: 1642: The computer began as a calculating machine1822: The Analytical Machine wasmade by Charles Babbage1936: Alan Turing wrote a book to describe how computers could be made to work1960s: Computers had new tran
19、sistors and became smaller1960s: The first family of computers connected to each 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
20、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 in 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: showi
21、ng very little intelligence 头脑简单的；笨的。Richard is smart but he has a lot of simple-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 d
22、ecision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：make 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
23、 a way, I like this new textbook very much从某种程度上说，Im afraid your 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
24、to pay shes a millionaire, after all6watch over: take care of 照料；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
