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、短信提醒辨析appear, seem 与 look
appear 强调外表给人某种印象，有时含实质上并非如此的意思。其后不可接as if从句。
He appears to know more than he really does.
It appears that we have to go there.
seem暗示有一定根据判断，这种判断往往接近事实，其后可接不定式，that或as if从句;
It seems as if he were in a daydream. (常用虚拟语气)
look着重由视觉而得出的印象，其后不可接动词不定式或that从句。
You look very tired. Why don’t you have a rest?
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