互动封闭仿真课堂
1、智能交互 2、电子板书式视频教学 3、在线互动问答 4、封闭课堂启发式教学方式
随堂测试、知识梳理、易错点揭示、总结启迪智能错题本
听课中的错题能自动加入错题本，课后可方便复习及导出错题本升级服务
在线答疑、课后同类题练习、讲义下载、短信提醒The significant inscription found on an old key---“If I rest, I rust”---would be an excellent motto for those who are afflicted with the slightest bit of idleness. Even the most industrious person might adopt it with advantage to serve as a reminder that, if one allows his faculties to rest, like the iron in the unused key, they will soon show signs of rust and, ultimately, cannot do the work required of them.
Those who would attain the heights reached and kept by great men must keep their faculties polished by constant use, so that they may unlock the doors of knowledge, the gate that guard the entrances to the professions, to science, art, literature, agriculture---every department of human endeavor.
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