说明：  本程序给出了两组不同权值对应的NURBS曲线！通过改变NURBS曲线的一组权因子，直观地了解权因子对NURBS曲线的影响情况！同时也可改变本程序中的节点序列，了解NURBS曲线的重节点插值、退化性质！
(This procedure is given two different weights corresponding NURBS curve! NURBS curve by changing the right of a group factor, an intuitive understanding of the right factor on the impact of NURBS curves! At the same time can also change the process node sequences, the re-understanding of NURBS curve interpolation nodes, the degradation of nature!)