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、短信提醒一、that: 可指人或物;在定语从句中作主语，宾语，表语。(指人时，相当于who或 whom;指物时，相当于which)(一般不用于非限制性定语从句; 不可置于介词后作宾语) 如：
1. A letter that/which is written in pencil is difficult to read. (主语)
2. Do you know the gentleman that/who spoke just now?
3. You can take anything ( that) you like. (宾语)
4. What is the question (that/which) they are talking about?
5. Here is the man ( who/whom/that ) you want to see.
6. She's no longer the girl ( that) she used to be before.(表语)
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