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A letter to Edward, a columnist(报刊专栏作家)
Dear Mr. Expert:
I grew up in an unhappy and abusive (辱骂的)home. I always promised myself that I’d get out as soon as possible. Now, at age 20, I have a good job and a nice house, and I’m really proud of the independence（独立）I’ve achieved.
Here’s the problem: several of my friends who still live with their parents wish they had places like mine — so much so that they make mine theirs.
It started out with a couple of them spending the weekends with me. But now they seem to take it for granted (视为理所当然)that they can come any time they like. They bring boyfriends over, talk on the phone and stay out forever.
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