设Ω={(x,y,z)|x2 y2≤z≤1},则Ω的形心竖坐标zx2 y2≤Z 设Ω={(x,y,z)|x2 y2≤z≤1},则Ω的形心竖坐标zx2 y2≤Z 发布时间:2025-08-21 22:19:54