【正确答案】Computers
   Computers have brought about many changes in the world. With the development of science and technology, the use of electronic computers is growing year by year in various fields of man's activities. They have been of great help in scientific research and engineering. They can do at a very high speed the calculations too complicated for a man to do in a few days or even in a few years.
   Once given a program, a computer can operate automatically at a high speed. Not only can the computer store data, but it can also put them out in a split second whenever they are needed.
   However, computers are not replacing us. Even though computers are taking over some of the tasks that were once accomplished by our own brains, they are nothing but machines. Therefore, they will never take the place of man.