如果用K表示“知识”(knowledge),以D表示“难度”(difficulty),那么在“K·D=1”与“K/D=1”这两个等式中,哪一个成立呢?也就是“已有知识与学习难度成反比还是成正比”?每一位教师和家长都有过这样的体会,刚入学的孩子,在一二年级的学习、考试中表现出的学习能力和取得的成绩都是令人欣慰的,在我们看来,这些毫无知识基础的孩子学习那些比较“深奥”的知识,竟也能学 If K stands for “knowledge,” and D stands for “difficulty,” then between two such as “K · D = 1” and “K / D = 1” Which one is established? That is, “the existing knowledge and learning is inversely proportional to the degree or is proportional to” "Every teacher and parents have had such an experience, just learning children, in the first grade and second grade learning It is gratifying to note that the learning ability and the achievements made in the examinations are reassuring. In our opinion, those who have no knowledge base can learn the more esoteric knowledge and can even learn