In recent years， computers have grown in You can find them not only in the universities but on farms and in factories， shops and other The number of private computers has also risen tremendously within the past few Computers can do many useful They can provide people with efficient work， colorful entertainment and accurate High up in space and deep down in oceans， they are used to make scientific On farms and in factories， they help to do difficult In offices and at homes， they take over routine With their incredible potentials， fantastic speed and unbelievable convenience， computers are getting increasingly important in our The truth of the matter， however， is that any new technology， including computers， has a "dark" Computer crimes，which are difficuh to detect， cause a lot of trouble to business and Unexpected computer viruses may destroy a large quantity of useful Furthermore， the indulgence of children in computer games is very had for their mental and physical healthy We should therefore， be careful in using
