发布时间:2025-02-03 16:01:23
首先算人行道面积,再求水泥砖面积,最后求需要水泥砖的数量。需要进行单位换算。
138×3×100÷(9×9)
=41400÷81
=512块
约等于512块
汇祥跑步机是哪里的质量怎样价格贵吗对跑步机不太理解听朋友说汇祥还不错哪里可以看到实物呢
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