本文是笔者在使用人教版高中课标数学1A版所进行的教学实践中学生典型的困惑纪要.1针对“把集合的元素一一列举出来”,某学生提出,是否每个元素都要写出?2针对“所有奇数的集合E={x∈Z|x=2k+1,k∈Z}”,某生提出,集合Z比集合E“大”,为什么Z在E内,集合E反而比集合Z“小”?集合的 This article is a typical example of the students’ confusion in the teaching practice of the writer’s teaching in the 1st educa- tion version of the mathematics standard for senior high school students.1 For “list out the elements of the collection one by one”, a student asks if each element should be written out. 2 for “all odd sets E = {x ∈ Z | x = 2k +1, k ∈ Z}”, a student proposed that the set Z is “larger” than the set E, why Z is within E, and set E is Collection Z “small” collection