1、绘制螺旋线：PolarPlot[t, {t, 0, 36 Pi}]
3、在球面上绘制螺旋线，需要把u和v变成关于t的函数式：Show[ParametricPlot3D[{Sin[u] Sin[v], Sin[u] Cos[v], Cos[u]}, {u, 0, 2 Pi}, {v, 0, Pi}, PlotStyle -> Opacity[0.5]],ParametricPlot3D[{Sin[u] Sin[v], Sin[u] Cos[v], Cos[u]} /. {u -> t Cos[t], v -> t Sin[t]}, {t, 0, 2 Pi}, PlotPoints -> 1000, PlotStyle -> Red]]
5、增量：ParametricPlot3D[{Sin[u] Sin[v], Sin[u] Cos[v], Cos[u]} /. {u -> t/36 Cos[t], v -> t/36 Sin[t]}, {t, 0, 36 Pi},PlotPoints -> 1000, PlotStyle -> Red]
