The system allows teachers and administrators in two logged in at the same time...
于 2023-06-14 发布
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代码说明：
本系统允许教师和管理员两种身份登入，同时可以限制登陆的IP段或者IP地址，或者说只允许某一个IP段访问本系统。-The system allows teachers and administrators in two logged in at the same time can be restricted to landing IP paragraph or IP address, or permit only a single IP segment access the system.
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