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普通高中课程标准实验教科书《数学5(必修)》第2.1节有表述“写出下面数列的一个(注:强调“一个)通项公式,使它的前4项分别是下列各数”,这给学生留有“由前四项所确定的数列可能不唯一”的探究余地:而《数学2(必修)》的第1.2.2节有表述“图……分别是两个几何体的三视图,你能
Ordinary high school curriculum standard experimental textbook “mathematics 5 (required)” section 2.1 has expressed “write one of the following series (note: emphasizes ”one“ general term formula, so that its first four are the following numbers,” There is room for the student to “explore the sequence determined by the first four items”: “Mathematics 2 (required)” in Section 1.2.2 states “The figure...is a three-view of two geometries, respectively. you can