一定范围内某些确定的、不同的对象的全体构成一个集合,这个不定义性的概念中的“确定性”和“互异性”两性质所对应的题型和注意点都能被大家如数家珍的说出来,但是概念中“全体”这个关键词却很少有人问津,更不用去谈如何运用它去解题,对这个“整体性”的概念理解不透彻的学生做题时就容易犯很多错误,“全体”这个关键词在解题中的应用. A certain range of certain objects, different objects constitute a collection of all, this definition of indefinable concept “certainty ” and “” different nature “corresponding to the types and points of attention can Is said by everyone, but the key word ”all“ in the concept is seldom used, not to mention how to use it to solve problems. Students who do not fully understand the concept of ”integrity“ It is easy to make a lot of mistakes when making a question, ”All " This key word solves the problem in the application.