发布时间:2025-02-05 09:36:55
那砖头是正六边形,每边长度相等,设边长为x(x自己用尺量一下)
所以S=2x*√3x/2/2+x*x
一般x=35厘米
请说出半穴居式和干栏式房屋各自的优点两点即可两种房屋结构的不同是由什么决定的说明了什么
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