发布时间:2025-01-31 04:30:09
半径为12.56÷3.14÷2=2m
体积为π×2^2×2=8π 立方米
可以盛稻谷8π×600=4800π≈15079.64千克
我想买一个给车换轮胎用的十字套筒扳手但现在纠结于买16寸还是买20寸的也就是40厘米长还是50
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