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64、I bought a new hat to r the old one. 65、---- What is your mother t_________? ---- My n________ language is Chinese.
66、Since we are his real frinds, we should try our best to help him out of the difficult s .
67、Is Chinese one of the _________ (工作) languages of the United Nations?
68、He (反复说)there was no quick answer to your question.
69、It is difficult to tell what our f_____ will be.
70、In what ________ (情形) do you use these words?
71、He dried his hands with a t .
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