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. As we all know, smoking is harmful to one's health . (as 作宾语)
=As is known to all, smoking is harmful to one's health . (as 作主语)
=It's known to all that smoking is harmful to one's health .
或:Smoking is harmful to one's health , as we all know .(as 作宾语)
或: Smoking, as we all know, is harmful to one' health.
2.He was a foreigner, as I knew from his accent. (宾语, 先行词是前面整个句子)
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