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Every advantage has its disadvantage. 有利必有弊。
Everybody's business is nobody's business. 人人负责，等于没人负责。
Every day is not Sunday. 好景不常在。
Every dog has his day. 谁都有得意的时候。
Every door may be shut， but death's door. 人生在世，唯死难逃。
Every heart has its own sorrow. 各人有各人的苦恼。
Every little helps a mickle. 聚沙成塔，集腋成裘。
Every man for himself， and the devil takes the hindmost. 人不为己，天诛地灭。
Every man has his faults. 金无足赤，人无完人。
Every man has his hobbyhorse. 萝卜青菜，各有所爱。
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