设置曲面边界样式为红色粗线条。 A: Plot3D[x^2+y^2,{x,-2,2},{y,-2,2},BoundaryStyle→Directive[Red,Thick]] B: Plot3D[x^2+y^2, BoundaryStyle→Directive[Red,Thick],{x,-2,2},{y,-2,2}] C: Plot3D[x^2+y^2, BoundaryStyle→Directive[Red,Thick],{y,-2,2},{x,-2,2}] D: Plot3D[x^2+y^2,{y,-2,2},{x,-2,2},BoundaryStyle→Directive[Red,Thick]]
设置曲面边界样式为红色粗线条。 A: Plot3D[x^2+y^2,{x,-2,2},{y,-2,2},BoundaryStyle→Directive[Red,Thick]] B: Plot3D[x^2+y^2, BoundaryStyle→Directive[Red,Thick],{x,-2,2},{y,-2,2}] C: Plot3D[x^2+y^2, BoundaryStyle→Directive[Red,Thick],{y,-2,2},{x,-2,2}] D: Plot3D[x^2+y^2,{y,-2,2},{x,-2,2},BoundaryStyle→Directive[Red,Thick]]
设置曲面边界样式为红色粗线条。 A: Plot3D[x^2+y^2,{x,-2,2},{y,-2,2},BoundaryStyle→Directive[Red,Thick]] B: Plot3D[x^2+y^2, BoundaryStyle→Directive[Red,Thick],{x,-2,2},{y,-2,2}] C: Plot3D[x^2+y^2, BoundaryStyle→Directive[Red,Thick],{y,-2,2},{x,-2,2}] D: Plot3D[x^2+y^2,{y,-2,2},{x,-2,2},BoundaryStyle→Directive[Red,Thick]]
设置曲面边界样式为红色粗线条。 A: Plot3D[x^2+y^2,{x,-2,2},{y,-2,2},BoundaryStyle→Directive[Red,Thick]] B: Plot3D[x^2+y^2, BoundaryStyle→Directive[Red,Thick],{x,-2,2},{y,-2,2}] C: Plot3D[x^2+y^2, BoundaryStyle→Directive[Red,Thick],{y,-2,2},{x,-2,2}] D: Plot3D[x^2+y^2,{y,-2,2},{x,-2,2},BoundaryStyle→Directive[Red,Thick]]
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