发布时间:2025-02-05 09:48:55
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
格力(GREE)WTE-PC8-5057家用净水器-详细介绍
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