![](https://cos-cdn.shuashuati.com/pipixue-web/2020-1231-2005-12/ti_inject-812ce.png)
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]]