人教版高中英語必修2教案Unit 3 Computer
unit 3 computerpart one: teaching design (第一部分：教學設計) period 1: a sample lesson plan for reading (who am i?) aims to talk about computer to read about computer procedures i. warming up warming up by talking about computerlook at 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 speak; these computers can be used for voice mail.計算機室
a computer frequently requires a boot device. the boot device contains the computer’s operating system and data. computer programs can be installed onto a computer. some people think that computers are less useful if they do not have access to the internet. they think this because the internet allows the computers to send and receive data and email across the world.曙光3000巨型計算機
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 stewardship. in some countries old computers are recycled (melted down) to get gold and other metals. this is dangerous, because this procedure releases the toxic waste into the water and soil.computers become obsolete quickly. very often they are given away and new ones replace them within two or three years. this makes the problem worse. computer recycling is thus common. many projects try to send working computers to developing nations so they can be re-used and will not become waste as quickly.
computer jargon 計算機行話 computer jargon means words to do with computers and surrounding topics. knowing what these words mean can help you know more about computers. some people use these words to impress other people (also known as buzzwords). examples of jargon: bit - the smallest data unit, can either be a “0.” or a “1.”. byte - unit of data. see also kilobyte, megabyte, gigabyte and nibble cpu –central processing unit, another name for processor data - information stored on a computer disk - a place to store data. email - electronic mail. ghz - gigahertz. used often incorrectly 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 salesman trick.