Communication revolution has brought a great convenience (1) to modern society and people. Especially, the occurrence of mobile phone, in a way (2), has changed the world where we live. Maybe the mobile phone was a luxury for (3) only a few a decade ago. Now, it is no exaggeration (4) to say that the difference between the part (5) and the present is as vast as that between earth and heaven. With no exception (6), campus students also fall into the category called 揷ell-phone school� (7).