20 The computer is an electronic machine. It is a machine that solves problems as much as you do. As an example, let s trace the way you would add two numbers. Then, let s see how a computer would do it.
Step1. You collect information. That is, you either see or hear the numbers to be added.
Step2. You find a method to solve the problem. In this case, you remember how to do addition.
Step 3 You bring together the information , and the method
Step 4 You perform the operation, adding the two numbers.
Step5 You report the results of your work, either by writing down the answer or by saying it aloud.
All computers go through five similar steps.
Step 1 The computer receives information, or data, from the outside. It changes the data into electric language, called input.
Step 2 The computer has been given a program contain instructions for solving the problem. The instructions ate found in the storage or memory.
Step 3 The computer bring together the data from the input and the instructions from the storage. This is done by the computer s control.
Step 4 The computer goes through the steps of the instructions on the data; this is called processing.
Step 5 The computer changes the result from electric language to human language. It presents the results in print or sound, called output.
Sometimes the five parts of a computer input, storage, control, processor , and output are together in one large unit. Other times they are far apart and connected by wires. Often, large computers have one control and processing unit, with a number of separate memory, input, and output device.
What does the passage mainly tell us?
A The computer is an electric machine.
B Computer solve problems in the same way as people do
C How we add two numbers
D Computers have five parts together in one unit.
雅思阅读写作机经
11月24日的雅思听力的回忆(网友版)
11月10日雅思的写作真题回忆
11月24日的雅思的写作真题回忆
雅思阅读语法真题回忆
雅思写作词汇精选
11月26日的雅思考试口语机经
11月10日的雅思口语的真题回忆
11月24日雅思的阅读真题(网友版)
11月17日的雅思的阅读真题的回忆
雅思听力分类词汇
11月24日的雅思写作的真题(网友版)
12月26日的雅思口语的真题解析
12月10号的雅思听力的考题回忆(网友版)
11月24日的雅思听力的真题回忆
雅思阅读真题题型与答案解析
雅思听力真题及答案网友版
雅思写作真题解读
11月17日的雅思的听力的真题回忆(网友版)
雅思写作真题及答案解读
11月26日的雅思写作真题(网友版)
12月7日的雅思的阅读回忆(网友版)
12月10日的雅思听力的答案解析
11月10日的雅思的阅读回忆(网友版)
雅思口语真题回忆
雅思听力复习精选试题
雅思考试的写作失分点补救
11月17日雅思听力的真题回忆
11月10日的雅思听力的真题考试回忆
11月17日的雅思阅读的真题的回忆
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |