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14. in the early days 在早期
15. take…with… 随身带着……
Jiuzhaigou is a very beautiful place. It is in the Aba Tibetan and Qiang Autonomous Region in Sichuan Province. Jiuzhaigou is a valley. It is more than 40 kilometers long. The green and golden trees, the lofty and multi-shaped mountains and the clear and colorful waters form the unique beauty of Jiuzhaogou. The water of Jiuzhaigou is the soul of the beauty. There are more than 100 lakes of different shapes in the valley. These lakes have wonderful colors. They are called “haizi”, which means son of the sea. It is these beautiful lakes that make Jiuzhaigou a fantastic place. Between the forests and the lakes, there are nine Tibetan villages. The name Jiuzhaigou means Nine Village Valley.
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