必修 2 unit 3 同步教学设计

Unit 3计算机教学设计期间1: warming up and reading吉祥aimsTo talk about computerTo read about computerProceduresI. Warming upwarming up by talking about computerLookat the pictures on page 17。what are they？What do they have in common？Yes，they are computers。then what is a computer？a computer is a machine which stores knowledge in its memory and does calculations on that knowledge . this knowledge is stored in symbols；it is called data . a computer usually has a monitor to show results . however，some computers can speakthese computers can be used for voice mail。计算机房a computer frequently requires a boot device . the boot device contains the computer s operating system and puter programs can be installationsthey think this because The internet allows The computers to send and receive data and email across The world .凌晨3000兆计算机a computer is now almost always an electronic device . it usually contains materials which are toxic；these materials will become toxic waste when disposed of .when a new computer is purchased in some places，Laws require that the cost of its waste management must also be paid for。this is called product steward ship。in some countries old computers are recycled to get gold and other metals。this is dangerous，because this procedure releases the toxic waste into the water and puters become obsolete quickly . very offten they are given away and new ones replace them within two or three years .this makes the problem worse . co Mputer recycling is thus common . many projects try to send working computers to developing nations so they can be re-uu计算机jargon计算机术语电脑jargon means words to do with computers and surrounding topics。knoving what these words mean can help you know more about computers . some people其他people (also known as buzz words)。Examples of jargon:Bit-the smallst数据单元，can either be a 0 or a 1 .“。Byte-unit of data.see also kiobyte，megabyte，gigabyte and nibbleCPU中央处理器，another name for processordata-information stored on a computerDisk-A place to store data。电子邮件。GHz-giga hertz . used offten incorrect to describe the speed of a processor。but with some 2.4 GHz processors faster than 3.6 GHz ones，it is clear that it is just a sales man trick。Load-Get data from a diskNibble-Half a ByteSave-Put data on a diskRAM-random-access memory，the more the better。USB-Universal Serial Bus(超薄插槽，可轻松插入各种附件)Www-worldwide web，part of the internet二.前就绪-reading1.questioning and answering what do you know about computer？performing calculations and other manipulations of various types of data，under the control of a stored set of instructions。the machine itself is the hardwarethe instructions are the program or software。depending upon size、computers are called mainframes、mini computers、and micro computer s . micro computer s include desk-top and portsmulti-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控制单元，and supplies an output . aa programmable hardware component that is controlled by internally stored programs And that can perform substanial computationsrelated to automation and electronic data processing。the library of congress commonly classes most computer-related books in HF 5548，qa75-76，z52，t385，and some tk ranges。a machine for performing calculations automaticallycalculator : an expert at calculation(或at operating calculating machines)a computer is a device or machine for making calculations or controlling operations that are expressable in numerical or logical putersthe complex interactions of these components endow computers with the ability t O process information . if correctly configuredif a computer configured in this way is give2.discussing and sharing how have computers changed our lives？Someday soon，if you havent already，you re likey to pluginto the computer network nation growing in puter terminals，Or small computers connected via modem(a modulator/demodulator circuit for encoding/decoding计算机编码模块)they re a much more useful And humane tool than the phone，And with corporate America behind them the networks will be everywhere-changingjoining a computer network is the same as joining a community。small systems are like village，Where new members are formally welcomed . the larger networks，the source and compuserve，for example三.Reading1.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 pause，pronun