考试辅导：2011年英语四级考试阅读主旨题解题技巧(14)

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　　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.
+ ~0 `+ g5 L* }9 `! g# J$ n& B% H　　Step2. You find a method to solve the problem. In this case, you remember how to do addition.
9 U: f+ d7 G5 K' A( j　　Step 3 You bring together the information (the two numbers), and the method (addition)
　　Step 4 You perform the operation, adding the two numbers.
: J2 x* |( t5 M3 P8 n" b* W　　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.
! a; G5 ]/ U  g　　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.
7 L1 ]+ s/ u; a7 n4 f1 A: a+ s　　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.
9 H2 U- E- W2 O8 h; E9 ^　　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
' n( t5 c  G% q　　D Computers have five parts together in one unit.
9 L5 g& v8 t) i+ X) _　　Key:B