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6. He was generous with his time, for which I was grateful.
7. The school where I studied for only two years was three kilometers away.
8. The day when Nelson Mandela helped me was one of my happiest.
9. However, this was a time when one had to have……
10. The parts of town in which they had to live were the poorest parts of South Africa.
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