发布时间:2025-01-24 03:02:08
铁管好,塑料的易变性。
把圆柱的底面分成许多相等的扇形然后把它切开拼成一个近似的长方体这个长方体的底面积等于圆柱的
2025-01-24 03:02:08 2025-01-24 03:02:08 2025-01-24 03:02:08 2025-01-24 03:02:08 2025-01-24 03:02:08 2025-01-24 03:02:08 2025-01-24 03:02:08 2025-01-24 03:02:08 2025-01-24 03:02:08 2025-01-24 03:02:08 2025-01-24 03:02:08 2025-01-24 03:02:08