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Doing is better than saying. 与其挂在嘴上，不如落实在行动上。
Do it now. 机不可失，时不再来。
Do nothing by halves. 凡事不可半途而废。
Don't claim to know what you don't know. 不要不懂装懂。
Don't have too many irons in the fire. 不要揽事过多。
Don't make a mountain out of a molehill. 不要小题大做。
Don't put off till tomorrow what should be done today. 今日事，今日毕。
Don't put the cart before the horse. 不要本末倒置。
Don't trouble trouble until trouble troubles you. 不要自找麻烦。
Don't try to teach your grandmother to suck eggs. 不要班门弄斧。
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