.2) Adolescents most frequently use Chat on-line, which is sequently followed with amusement, general information browse, e-mail, etc.

• 2)青少年在互联网上使用最多是在线聊天，其次为娱乐、听音乐、看电影、一般的信息浏览、收发邮件和搜寻网上资源等。