精选优质文档-倾情为你奉上 Nowadays, with the rapid development of our society, especially the IT and information industry, cell phones are accessible and they play a dominant role in our daily life, which greatly facilitate our lives. Firstly, its very useful and convenient. As a wireless mobile phone, it can be easy to carry and make people reach others and be reached immediately, without considering the location. Secondly, its also a perfect recreational tool. With the progress of science and