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函数是一个核心概念,函数思想则是一种核心的数学思想方法.在核心概念和思想方法视野下做好“函数”的教学设计,则是一种新的
The function is a core concept, and the function idea is a kind of core mathematics thinking method. It is a new kind of instructional design to do a good job in the view of core concepts and methods of thinking.