In recent years， people are developing an inseparable relationship with Internet. As is vividly depicted in the picture， it is convenient for us to click the mouse when surfing on line， either to entertain ourselves or to meet the work‘s needs. Actually on-line visiting has become a routine activity in our everyday life. However， it seems rather ironic to use a chain instead of normal wire to connect with the mouse in this picture. The exaggerative and impressive portrayal has subtly revealed the duality of the relationship between man and Internet.

Discussion on the duality has become very popular in newspapers or in people‘s chats. On the one hand， no one denies that Internet is currently one of the most useful media in our daily life. People from all walks of life are benefiting considerably from its powerful function of information communication. But on the other hand， a GREat many people admit that they are too much addicted to Internet to maintain a regular and wholesome lifestyle. Cyber-living resembles the experience of looking constantly into a kaleidoscope which displays both colored patterns and illusions. Such a waste of time inevitably leads to their failure in their life and work.

Accordingly， it is necessary for us to use Internet in a reasonable way and restrain from overindulgence. For one thing， college students in expanding numbers get on line every day to learn the news， to study English by registering for web courses， to exchange information through e-mails with their net friends and to download their favorite music， FLASH， film and pictures. Being veteran on-line shoppers， they frequently purchase books， CDs at much lower prices. For another， once indulged in the fictitious world， people can barely concentrate on real life. Consequently， many students just chat on line or play computer games immoderately everyday， skipping many essential classes. After all， Internet is invented to enrich our life， to connect you and me， and to improve the efficiency of our work rather than shackle us with a chain.