• 2022-06-16
    F(x,y)是二维随机变量(X,Y)的分布函数,则[img=176x19]17e0c39ac3f8530.jpg[/img]=
    未知类型:{'options': ['', ' [img=264x19]17e0c39adda9686.jpg[/img]', ' [img=264x19]17e0c39aeaa89dc.jpg[/img]', ' [img=264x19]17e0c39af784e0b.jpg[/img]'], 'type': 102}