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Frank has just got off the train in the evening.He wants to call one of his friends to pick him up at once.He looks for a while and at last finds a telephone booth.But when he gets there, he sees a lady already in.There are no other public telephones nearby,so he has.to wait. He waits and waits.The lady on the phone is just talking andlaughing.She seems as if she doesn't notice Frank. After about half an hour,the lady puts down the receiver.Frank feels a bit released. She is finished finally,he thinks. But to his surprise,the lady picks it up again,fishes a coin from her pocket and pushes it into the slot."Oh, no!"Frank says to himself."She is making another call."
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