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5. cool down：（1）使平静；（2）使冷却
（1）The man patted the woman on her back to cool her down.男人拍拍女人的背，让她冷静下来。
（2）A glass of ice water may cool you down a little.一杯冰水也许能让你凉快点。
6. crawl with：爬满
The boy dorpped a little honey on the table and soon it was crawling with ants.男孩滴了一点蜂蜜在桌上，很快桌子就爬满了蚂蚁。
混淆短语：crawl into one's favor：拍某人马屁
He is the kind of supervisor that hates his subordinates to crawl into his favor.他是那种讨厌不下拍马屁的主管。
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