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7.from/in/on/at/about/ which引导定语从句
关系代词which, whom在定语从句中作介词的宾语时，介词一般放在关系代词之前，有时也放在定语从句后面。
The train on which I was traveling was late.
The house in which the old man lived was on fire last night.
The old Olympic Games from which the modern games came began around the year 776 BC in Greece.
8.more ... than有两种含义：一是普通的比较级;另一种表示“与 其说是……”, “是……而不是”，指对同一事物的两种属性进行选择。
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