函数是中学数学的重要内容,函数概念贯穿中学数学的始终,而对映射概念的理解有助于加深对函数知识的理解.虽然《考试说明》中对映射的要求较低,但在近年来的各类测试题中,却连续出现以映射为知识点的小题,故要引起足够重视.下面例析有关映射的热点问题,供参考. The function is an important content of middle school mathematics, the concept of function runs through the middle school mathematics, and the understanding of the mapping concept helps to deepen the understanding of the function knowledge. Although the requirements of the mapping in the “exam description” are low, but in recent years Among the various types of test questions, there are consecutive questions that map to knowledge points, so we should pay enough attention to it. The following example analyzes the hot issues of mapping for reference.