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81.The earth was once a beautiful planet where people lived happily ___ trees and animals. Now , the world is dark and dirty, with no room ___ happiness and fun.
A.among; for B.between, for C.between; of D.among; of
82.-Whose advice do you think I should take?
-____.
A.You speak B.That's it C.It's up to you D.You got it
一站式课程咨询服务平台
