发布时间:2025-02-05 20:54:23
你先用3米的层高除以0.3米(每步楼梯的高度)那得到了10(踏步的实际需要数量)再用10步乘以0.2米(踏步的宽度)商是2米(这就是你实际使用的整个楼梯的总宽度2米)
我性格内向现在卖油烟机我想突破自己但是来了顾客不知道怎样交流顾客听完介绍就走了而我也不知怎
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