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But a travel guide need not be a book. It could be a pamphlet or even a person.但旅行指南不必是一本书，可以是一本小册子，或是一个人。
In most major tourist areas, you can hire the service of a person who will act as your travel guide.在大多数主要的旅游景点，你可以雇个人当导游。
They will help you to get to all the right places as safely as possible.导游会把你安全地带到要去的地方。
There are millions of travel guides of all kinds in the world.世界上有各种不同类型的旅行指南，数不胜数。
And reading them can be almost as good as the real thing.光是阅读它们，就有种身临其境般的感受。
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