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I have to travel every day from Souk Road to the airport. Two buses travel along the line: the number 49 and number 16. But by the time the number 16 bus gets to Souk Road, it is always full, so I can’t get on it. I have to wait for the number 49, because sometimes there are empty seats on it.
The timetable says that there are buses from Souk Road to the airport every ten minutes. If this is so, why do I have to wait half an hour for a bus every day?
The regulations(规章)say that if there are empty seats on a bus, the bus must stop at every stop where people are waiting. Why do the half-empty buses go straight past me when I am standing at the bus stop?