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There is a wonderful story about a young girl who had no family and no one to love her.
One day， feeling very sad and lonely， she was walking through a grassland when she noticed a small butterfly caught in a thorn （荆棘） bush. The young girl carefully released the Butterfly. Instead of flying away， the little butterfly changed into a beautiful fairy. The young girl rubbed her eyes in disbelief.
“For your wonderful kindness，” the good fairy said to the girl， “I will give you any wish you would like.” The little girl thought for a moment and then replied， “I want to be happy.”
The fairy leaned toward her and whispered in her ear. Then the fairy disappeared.
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