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 Summer is the second season in a year. It is between spring and autumn. The sun of summer is the hottest;the water of summer is the warmest; the places of interests in summer are the most crowded throughout the world.
Firstly, summer is studentsthe most favourite season because their longest vacations of the year are in summer.Many of them try to enrich their social and healthy life by participating in a number of interesting outdoor activities,include of camping with friends and family members, going to the beach or swimming at public pools,traveling and sightseeing locally and nationally. However,some of them try to make good use of their vacations in gaining their working experiences in summer.Other students may try to improve their academic performance by going to their summer schools.
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