1. The introduction of Agatha Christie　　Agatha Christie was born in Torquey， South West England in 1890 and died in 197......

青少年网上聊天是对自身发展需要的满足,是对无意识的自由表演,是对成功的自主强化.网络迷恋者具有依赖型人格特征.上网青少年主要......

Nowadays,chatting programs have become very popular among TV audience,because they are well integrated with information,......