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Being a product of high-technology，mobile phones are being more and more widely used。 It"s small in size， light in weight and easy to carry， offering fast and convenient service for communication。It"s of multi-function。 The users use it for calling， sending short messages and internet-surfing。 In recent years， mobile phones have become popular among middle school students。
Quite a few use them at school to keep in touch with their families and friends instead of writing letters， which， of course brings convenience to them。 But I don"t think it"s good to do so。 In spite of the advantage mentioned above， student users often waste a lot of time chatting over the phone in their spare time， some even use them to cheat in exams。 In addition， mobile phone bill is also a heavy burden on students" families
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