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①先行词是不定代词all, few, little, much, something, nothing, anything等。例如：All that we have to do is to practise every day.
②先行词被序数词或形容词最高级所修饰。例如：The first lesson that I learned will never be forgotten. This is the best film I’ve ever seen.
③先行词被all, any, every, each, few, little, no, some等修饰。例如：I have read all the books(that)you gave me.
④先行词被the only, the very, the same, the last修饰时，例如：He is the only person that/(who) I want to talk to .
⑤先行词既有人又有物时，例如：They talked of things and persons that they remembered.
⑥当句中已有who时，为避免重复。例如：Who is the man that is talking to John?
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