发布时间:2025-01-23 20:15:28
R为半径,体积V=4/3*pi*R*R*R,表面积S=4*pi*R*R, 比表面积=S/V=3/R,减小半径就可以了。
毛坯房墙壁全是水泥想过年回家简单装一下求大神赐教墙壁简单粉个白该怎么弄
2025-01-23 20:15:28 2025-01-23 20:15:28 2025-01-23 20:15:28 2025-01-23 20:15:28 2025-01-23 20:15:28 2025-01-23 20:15:28 2025-01-23 20:15:28 2025-01-23 20:15:28 2025-01-23 20:15:28 2025-01-23 20:15:28 2025-01-23 20:15:28 2025-01-23 20:15:28 2025-01-23 20:15:28 2025-01-23 20:15:28 2025-01-23 20:15:28 2025-01-23 20:15:28 2025-01-23 20:15:28 2025-01-23 20:15:28 2025-01-23 20:15:28 2025-01-23 20:15:28 2025-01-23 20:15:28