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Listen and comprehension. Computers form 10
A computer is really a very specific kind of counting machine. It can do arithmetic problems
faster than any person alive. By means of electric processes it can find the answer to a very
difficult and complicated problem in a few seconds.
A computer can ‘remember’ information you give it. It keeps the information in its ‘memory’
until it is needed. There are different kinds of computers. Some can do only one job. These are
special-purpose computers. Each specific problem requires a specific computer. One kind of computer can help us build a spaceship; another kind can help us navigate it. A special –purpose computer is built for this purpose alone and cannot do anything else.
But there are some computers that can do many different jobs. They are called the
general –purpose computers. These are big ‘brains’ that solve the most difficult problems of science. We used to think of a computer as a large machine that took up a whole room. But today computers are becoming smaller and smaller. Though these small devices are called microcomputers or minicomputers, they are still true computers. There are several advantages in making computers as small as we can. Sometimes weight is particularly important. A modern plane carries many heavy electronic apparatus. If it is possible to make any of them smaller, it can carry a bigger weight. But weight is not the only factor. The smaller computer, the faster it can work. The signals go to and from at a very high but almost constant speed. Some of the first computers cost millions of dollars, but people quickly learnt that it was cheaper to let a million dollar computer make the necessary operations than to have a hundred clerks trying to do the same by hand. Scientists found that computers made fewer mistakes and could fulfill the tasks much faster than almost any number of people using usual methods. The computers became popular. As their popularity grew the numbers of factories producing them also grew.
I) A computer is a kind of a ________
a) counting machine b) typerwriter c) table game d) TV set
2) Computer could be used to ______
a) play games b) solve different problems c) cool meals d) save money
3) The text tells us about special-purpose computers and __________
a) all-purpose computers b) calculators c) general-purpose computers
d) ordinary computers
4) The smaller computer, the ________it can work.
a) more effectively b) slower c) better d) faster
5) Some of the first computers cost ___________
a) hundreds of dollars b)millions of dollars c) thousands of pounds
d) millions of pounds
6) It is cheaper to let the expensive computer do the job than to ___________
a) have a hundred of clerks b) do the job oneself c) buy another computer
d) waste your time and efforts
7) Computers can fulfill the tasks much ________than any number of people using traditional methods.
a) cleverer b) better c) faster d) worse
8) Computers became very ____________
a) large b) small c) expensive d) popular
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