ggg0301开发者_如何学Go 2021-09-18 20:23 被子长宽高分别是300cm*200cm*5cm=300000cm3烟头 横截面*长度1cm2*3cm=3cm3由于被子有一点蓬松烟头体积可以变成两倍差不多15万个烟头
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