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Nowadays mobile phones are becoming more and more popular in China. As is said, there are more than 500 million mobile users in our country. Sometimes you can even see students using them.
Mobile phones have brought people a lot of benefits, but the most important is that they are convenient. If there is a sudden accident at school, It is much quicker for us to dial for help.
However, mobile phones can also bring people problems. The most serious is the electric wave radiation which is thought to be harmful to users¡¯ brain. Another problem is the when we are having a lesson, the ring of the mobile phone may interrupt us. Last but not the least, students may spend a lot of time playing games in the mobile phone as well as sending short messages.
In my opinion, because there are more disadvantages than advantages, it is not necessary for us students to carry a mobile phone at school.