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She opened the hood and looked down at the motor. Her eyes could see nothing wrong since she knew little about cars. However, she reached down and touched some lines.
A car pulled up behind hers and stopped. A man in his thirties got out and came to where she was standing. A friendly voice said, “Has your car trouble?”
“I certainly am,” Linda answered. “It suddenly stopped and wouldn’t start again.”
The man looked at the motor for a moment or two then reached in and reattached (重新接上) a line. “It should start now.” he said kindly.
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