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a. Many people like animals and take them as their pets. Pet hospitals are very busy. Kind persons who love animals are needed to work in busy animal hospitals. They will teach you the job.
b. Scientists think that pets will probably be much smaller, because people in the future will be living in much smaller spaces. Scientists are already working on making very small farm animals. The same things might be done to make smaller cats and dogs.
c. It is said that some day you might own a panther(豹)as a pet. Scientists might have to start turning wild(野生的)animals into pets. This might be the only way to save them from dying out.
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