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(1) custom 指传统风俗、习俗，也可指生活习惯，后接不定式。
They broke some of the old customs.
It is the custom in China to eat dumplings during the spring Festival.
(2) habit 指个人生活习惯。“(有)养成……习惯”常用
be in / fall into / get into / form / have the habit of doing sth.
句型；“戒掉……习惯”常用
give up / kick / break away from / get out of the habit of doing sth. 句型。
It's easy to get into a bad habit but its hard to give it up.
The drug easily get one into the habit of smoking.
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