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关于IT product的英语作文
Nstant-dict is an e-dictionary made in hong kong, china. it is the latest product of hongyun company ltd.
With a large vocabulary of i million words and phras stored in it. So you can look up any word you meet in your nior period. instant-dict is controlled by advanced computer technology which is also the latest technical result of the company's 20-year rearch. The body of the instant-dict is made of light metal.
Therefore it is small in size and convenient to carry; besides, it is easy to operate. The price is reasonable. It is a wi choice for english learners.
What a Computer Does
The instructions in the program direct the computer to input,process and output as follows:保育老师
Input/Output
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The computer can lectively retrieve data into its main memory (RAM) from any peripheral device (terminal,disk,tape,etc.) connected to it.After processing the data internally,the computer can nd a copy of the results from its memory out to any peripheral device.
The more memory it has,the more programs and data it can work with at the same time.
重庆大全Storage
By outputting data onto a magnetic disk or tape,the computer is able to store data permanently and retrieve it when required.A system's size is bad on how much disk storage it has.The more disk,the more data are immediately available.
橄榄球的英文Processing (The 3 C's)
日及The computer performs all processing by "calculating," "comparing" and "copying" the data stored in its memory (RAM).
Calculate
The computer can perform any mathematical operation on data by adding,subtracting,multiplying and dividing one t with another.
Compare
The computer can analyze and evaluate data by matching it with ts of known data that are included in the program or called in from storage.
没有做不成的事Copy
The computer can move data around to create any kind of report or listing in any order.
Calculate,Compare and Copy
By calculating,comparing and copying,the computer accomplishes all forms of data processing.For example,records are sorted into a new order by comparing two records at a time and copying the record with the lower value in front of the one with the higher value.
The computer finds one customer out of thousands by comparing the requested account number to each record in the file.The query statement:SUM SALARY FOR TITLE = "NURSE" caus the computer to compare the title field in each record for NURSE and then add (calculate) the salary field for each match.
In word processing,inrting and deleting text is accomplished by copying characters from one place to another.
