Nowadays, a flood of reference books has become a great concern among students and teachers.There are all kinds of reference books in market, making students and teachers difficult to choose.Besides, reference books also bring bad influence to students and teachers.
目前，大量的参考书在教师和学生中对已经形成了担忧。市场上有各种各样的参考书，让学生和教师都很难选择。除此之外，参考书也给教师和学生带来不良的影响。
