绘制空间参数曲线【图片】 A. ParametricPlot3D[{Cos[u],Sin[u],u},{u,0,2Pi}] B. ParametricPlot3D[{Sin[u],Cos[u],u},{u,0,2Pi}] C. ParametricPlot3D[{Cos[u],Sin[u],u},{u,-Pi,Pi}] D. ParametricPlot3D[{cos[u],sin[u],u},{u,-Pi,Pi}] ...