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1年前
For many years, no one could communicate with people who had been born without hearing.
1年前
Do you know the Money King, the great hero of the Chinese story Journey to the West?
1年前
2012年12月25日,上海市第二中级人民法院对上海市规划和国土资源管理局原副局长胡俊受贿案作出一审判决
1年前
设随机变量X~U[0,1],Y=X^2-4X+1,求: (1)随机变量Y的概率密度; (2)EY和DY; (3)X与Y的相关系数.
1年前