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10. material n: matter from which things are made eg. Wood and stone are the only raw materials on the island. The teaching material in the school is advanced. Your writing materials are there.
11.create v: to cause to be or exist eg. An artist should create beautiful things. How was the universe created?
That would create a wrong impression.
12. arise (arose, arisen) vi: come into being eg. A question arose in the meeting. Disagreements arose between them.
Unexpected difficulties arose in the course of their experiment.
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