一、集合知识简介 我国现行中、小学数学课本对集合的知识已有所安排,中学在高一讲授,小学和初中虽不提出集合的概念,但从小学一年级开始,整套课本都渗透了集合与对应的观点。因此,有必要对集合的初步知识作一个浅显的介绍。 什么是集合?在考虑问题时,把一些“东西”当成一个整体来看待,这些“东西”的全体就是一个集 I. INTRODUCTION TO INTEGRATING KNOWLEDGE In our country, primary and secondary mathematics textbooks have already arranged the knowledge of the collection. High schools teach in higher schools. Although primary schools and junior high schools do not put forward the concept of gathering, since the first grade of primary school, the whole set of textbooks have infiltrated the collection With the corresponding point of view. Therefore, it is necessary to make a brief introduction to the initial knowledge of the collection. What is a collection? When we consider a problem, we treat it as a whole, and the whole of these things is a collection