‎设置选项让曲面透明和无边界框去观察马鞍面(双曲抛物面)‏ A: Plot3D[x^2-y^2,{x,-3,3},{y,-3,3},PlotStyle→Opacity[0.2],BoxRatios→{1,1,1}] B: Plot3D[x^2-y^2,{x,-3,3},{y,-3,3},BoxRatios→{1,1,1},PlotStyle→Opacity[0.3]] C: Plot3D[x^2-y^2,{x,-3,3},{y,-3,3},PlotStyle→Opacity[1.0],BoxRatios→{1,1,1}] D: Plot3D[x^2-y^2,{x,-3,3},{y,-3,3},BoxRatios→{1,1,1},PlotStyle→Opacity[0.25]]

设置选项让曲面透明和无边界框去观察马鞍面(双曲抛物面) A: Plot3D[x^2-y^2,{x,-3,3},{y,-3,3},PlotStyle→Opacity[0.2], Boxed→False] B: Plot3D[x^2-y^2,{x,-3,3},{y,-3,3},Boxed→False,PlotStyle→Opacity[0.3]] C: Plot3D[x^2-y^2,{x,-3,3},{y,-3,3},PlotStyle→Opacity[1.0],BoxRatios→{1,1,1}] D: Plot3D[x^2-y^2,{x,-3,3},{y,-3,3},BoxRatios→{1,1,1},PlotStyle→Opacity[0.25]]