已知正八面体的棱长为a. 1求相邻两面中心的距离 2求两个相对面之间的距离. 题目和参考答案——青夏教育精英家教�—— Template




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tomski已知正八面体的棱长为a. 1求相邻两面中心的距离 2求两个相对面之间的距离. coloring