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3.dig out 1) to get sth out of a place, using a spade or your hands 2) to find sth you have not seen for a long time, or that is not easy to find Let’s dig out the roots. Why did you dig out all those old magazines? We must dig the truth out of him.
4.a (good \ great \ large) number of n.(pl.) many; a large quantity of; a lot of A good number of students are not interested in modern art. I’ve seen the film a number of times. The Great Wall attracts a great number of foreign tourists every day. the number of… The number of private colleges has increased. = Private colleges have increased in number.
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