针对企业计算机上网所遇到的安全问题,从物理隔离和非物理隔离两个方面,论述了以防火墙、加密技术、认证和信息转发服务器、双硬盘......

Objective: The purpose of this study is to investigate habitual leisure-time activities (physical and non-physical leisu......

This study applied multilevel modeling to investigate the impact of observed predictors and different levels or groups t......