importmatplotlib.pyplotaspltimportnumpyasnp# 导入绘制三维的模块frommpl_toolkits.mplot3dimportAxes3Dfig=plt.figure(figsize=(20,10))# 绘制三维曲线axl=fig.add_subplot(221,projection='3d')theta=np.linspace(-4*np.pi,4*np.pi,500)z=np.linspace(-2,2,500)r=z**2+1x=r*np.sin(theta)y=r*n...