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4.In the dark street, there wasn't a single person to whom she could turn for help.
Is this the factory to which you paid a visit last week?
Is this factory the one to which you paid a visit last week?
5.This is the girl whom they are looking after. (介词after与look构成固定词组，不可前置。再如：look at, look for, look after, take care of等)
四、as 的用法:(as 引导定语从句, 在定语从句中作主语、宾语、表语)
一站式课程咨询服务平台
