关于如何安全上网的英语作文70字？

Along with the time development, accessing the net already turned the extremely universal matter. No matter is adult or the child, so long as mentioning the computer, all think of internet. But, accessing the internet is advantageous ,but also has shortcoming.
I knew very many people access the net, mainly is for playing games, which is very bad for the study. Therefore, some people believed, the elementary and middle school students lack the self-control.
But,there are many people approving to accessing internet, why? Because internet can provide to the people very helps. First, the network looks like a library, we can look up very many materials easily,and it is quicker than the speed of consulting books; Next, we may read a richer news on-line; In addition, accessing the net also has other functions, for example, E-mail, telephoning on the net and so on.
Actually, accessing the net has its profit and the shortcoming place. We use it to open to expand the field of vision, the study knowledge, but must certainly grasp the discretion.