斜二测画法原理为什么倾斜45°y轴就要减半,这是什么原理?是人为规定,还是计算得出的?若是人为规定,那么是否有正确的数量关系?

来源:学生作业帮助网 编辑:作业帮 时间:2024/07/21 16:34:27
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