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、短信提醒二、whose whose既可指人也可指物，指物时whose 名词 = of which the 名词 / the 名词 of which.
如：The plastic bottle， whose top / of which the top / the top of which is cut off， can be used as a container to grow plants in.比较：The plastic bottle， （with） the top cut off， can be used as a container to grow plants in. （此处为独立主格结构）
三、which和as which和as都可引导非限制性定语从句，用来指代整个主句的内容， which 引导的从句只能放在主句后，as 引导的从句放在主句前后均可；which 意为“这一点”，as 意为“正如”。as还可用于the same …… as， such …… as等结构中，引导限制性定语从句。
如：He turned out to be a great success as a dancer， which was more than we could expect. As is known to all， Madame Curie is the first woman scientist in the world to have won two Nobel Prizes. Have you bought the same dictionary as I referred to yesterday？
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