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The world outdoors is full of secrets.They are so attractive that quite a lot of people are busy 1 them.All 2 us are birds,animals,trees and flowers.The facts about how they live and grow are as interesting as anything could be.
Do you know that one of the great presidents of the USA spent hours and hours studying birds?A businessman who lives near New York City became so interested in insects that he began to 3 them.He now has over one thousand different kinds of insects carefully kept in glass boxes.
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