中美两国中学数学教材中函数概念的比较章以昕（江苏教育学院数学系２１００１３）函数是整个数学体系中一个基本而又重要的概念，它几乎渗透到数学的各个分支中，而且自然科学的绝大部分也受到函数概念的支配．因此，在中学基础数学教育中，各国的教材里都必不可少地讲到... Comparison of Functional Concepts in Middle School Mathematics Textbooks between China and the US Zhang Yixin (Department of Mathematics, Jiangsu University of Education 210013) The function is a basic and important concept in the whole mathematics system. It almost penetrates into all branches of mathematics, and it is absolutely natural science. Most of them are also subject to the concept of functions. Therefore, in the basic mathematics education in middle schools, the teaching materials of all countries are indispensable to talk about...