说明：  1、画出函数y=x*sin(x) 2、用曲面表示z=x^2+y^2 3、创建n阶魔方矩阵，n能被4整除 4、三维图形影片动画 5、画出N=100，p=0.5情况下二项分布的概率 特性曲线
(1, draw the function y = x* sin (x) 2, using surfaces to describe z = x ^ 2+ y ^ 2 3, create a cube matrix of order n, n be divisible by 4 4, 3D graphics, animation film 5, draw N = 100, p = 0.5 case, the binomial probability curve)