As we all know,TV is an important assistant in our dailiy life.Not only can we watch all kinds of programes from it,but also we can learn much knowledge by watching TV.It is a technical device playing an imprtant role in our entertainment time .TV has experienced a long development period from black-and-white to colorful nowadays .It is a witness of times.As to our sudents,we should prevent ourselves from being addicted to TV,but some attention paid to it is still needed.