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. The question is ______can be put into practice.
A. how you have learned
B. how what you have learned
C. that why you have learned
D. how that you have learned
6. A hinge joint is _______ permits the forwards and backward movement of a door.
A. that B. what C. those D. which
7. One reason why Hamlet is such a successful play is that _______.
A. it appeals differently to people
B. different people are appealed
C. it appeals to many different people
D. people find it appealing to them very much
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