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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there are several keys to success. first, your goal must be practical and practicable. if you set your goal too high, chances are that you will never attain it. next, you have to make a plan of doing it. you can take some steps to realize it. since the process is quite tough, you need to be diligent, patient and persevering. even if you meet with some difficulties or frustrations, just take them in your stride. you can always tell yourself that there is nothing insurmountable. with this will and determination, success is sure to wait for you at the end of the tunnel!
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