计算机专业英语教案--3[3页]

1、教材名称： 计算机专业英语 主 编： 来永春出版时间：第 3 次课电子教案学时 2project one assembling computers授课题目（章，节） part a theoretical learningfast reading one input and output授课类型（请打） 理论课 研讨课 习题课 复习课 其 教学目的：1 in this part, our target is to improve the speed of reading professional articles and the comprehension ability of the read

2、er.2.we have marked specialized vocabulary key words in some paragraphs so that the reader can quickly grasp the main idea of the sentences and paragraphs.教学方法、手段：1. by the computer, projector and blackboard-writing2. by the student-centered learning, using classroom teaching method, communicative t

3、eaching method, task-based teaching method and audio-visual teaching method教学重点、难点：1. master the key words and phrases in the text.2. analyze the structure of the complex sentences in the text.3. translate the text into chinese with the help of the reference materials.3.describe input and output.教学内

4、容及过程设计补 充 内 容 和 时间分配教学设计step 1.generally speaking, the faster you read within limits, the better you will 20 分钟 comprehend. is it so with you? if it is, what are the limits? for you,optimum comprehension comes at speeds somewhat above your slowest rates.we often mention input/output system (or i/o )

5、, whats i/o system?in omputing, i/o is the communication between an information processingsystem (such as a computer) and the outside world. inputs are the signalsor data received by the system, and outputs are the signals or data sentfrom it. i/o devices are used by a person (or other system) to co

6、mmunicatewith the computer.step 2. skimming is a rapid -reading skill that does not require reading all thematerial word by word but requires a high degree of concentration. inthe process of skimming, you should look for the gist of the passage,skip the words and phrases that are not important to th

7、e meaning, andstill obtain an adequate comprehension.for example, the keyboard and the mouse (pic 1.10) may be an inputdevice or the computer, while monitors (pic 1.9) and printers are 25分钟 considered as output devices. modem (pic 1.11) and network interface cards(nic, pic 1.12), typically serve for

8、 both input and output devices.step 3 reading well requires more than understanding the words, sentences andideas. when you read the following paragraph, you should find out thedescriptions of some sentences quickly, and keep your thoughts flowingwith the authors.the mouse and the keyboard are input

9、 physical devices. users use themto input information, and then input devices convert it into the signalthat a computer can understand. the output information from these devicesis input for the computer. similarly, the printer and the monitor takeit as inputsignal that a computer outputs. they conve

10、rt these signalsinto symbols that the user can see or read.these interactions betweenthe computer and the user are called human-computer interactions.step 4. when your reading habits are good, your reading is efficient and rapid;when the habits are bad, your is slow and unsatisfying. when you read 2

11、0 分钟 with your eyes only, not with any part of your mouth. reading is a visual process, and at the same time, words can be understood without saying them in your mind. now read the following paragraph,memory is the device that the cpu can read and write to directly,with individual instructions. in c

12、omputer architecture, the combinationof the cpu andthe main memory isconsidered as the brain of a computer,and from that point of view, any transfer of information from or to thatcombination, for example to or from a disk drive, is considered as i/o.the cpu and its supporting circuitry provide memor

13、y-mapped i/o that isused in low-level computer programming, such as the implementation ofdevice drivers. an i/o algorithm is one designed to exploit locality andperform efficiently when data resides on secondary storage, such as adisk drive.step 5. in order to attain a higher level of comprehension,

14、 youd better make yourinitial fixation as you did before, then move your eyes to make a second25分钟 fixation, then another fixation, until you have finished the last word.mark off each of your eye spans with a slanting line as you move from the beginning to the end.a computer uses memory-mapped i/o a

15、ccesses hardware by reading and writing to specific memory locations, using the same assembly language instructions that computer would normally use to access memory.step 6. this task is to check your ability to understand and translate sentences.when you read long sentences carefully, the logical c

16、onnection is oftenfound between two sentences, for example, one sentence describing the occurrence; while the other explaining why or how it occurs, or what consequence it brings about this practice of identifying the logical connection among sentences helps to improve you reading comprehension. whe

17、n you read the following sentences, youd better analyze the structures of the sentences first. and then translate them into chinese. 1. in computing, i/o is the communication between an informationprocessing system (such as a computer) and the outside world.2. these interactions between the computer and the user are called human-computer interactions.3. memory is the device that the cpu can read and write to directly, with indi