The development of modern network is very good, however, the network makes people advantage, also have disadvantage, the: can increase their knowledge, information can also go online to find to find, sometimes, some information can also through the network suddenly realize, disadvantages: on the network there are many criminals think we into a trap, the computer to play more, also myopia, eye damage, some people also for play computer games, playing games, kill ... Hope that students do not often play computer games, or protect the eyes ...