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(5) Every night, Helen sleeps with all the windows open.
4.“with 宾语 介词短语”，如：
(6) With the school badge on his shirt, he looks all the more serious.
(7) With the security guard near the gate no bad character could do any thing illegal.
5.“with 宾语 副词虚词”，如：
(8) You cannot leave the machine there with electric power on.
(9) How can you lock the door with your guests in?
上面五种“with”结构的副词功能，相当普遍，尤其是在科技英语中。
接着谈“with”结构的形容词功能，有下列五种：
一、“with 宾语 现在分词或短语”，如：
(10) The body with a constant force acting on it. moves at constant pace.
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