________________________________________________________________________________Nowadays, mobile phones are more and more popular in our society.Even many students of high schools have got their own mobile phone. The mobile phone do offers a lot of convenience to us.With a mobile phone, we can call others no matter where we are. We can also send short messages. However, the mobile phone brings trouble as well.The signals of the phone disturb our living space too much. Sometimes it will be unsafe or unpolite to use mobile phone. What"s more, it can do bad to the students who pay too much attention to it.
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