His wife has been _______a lot of pressure on him to change his job.
The student found the novel _______. It provided him with so much information about the subject.
设随机变量 ( X, Y) 服从二维正态分布,且 X与Y不相关, f ( x) f ( y) X Y 分别表示 X,Y的概率密度, 则在Y=y的条件下, X的条件概率密度f X|Y (X|Y) 为()
设 n 为正整数,则能硝定 n 除以 5 的余数
(1) 已知 n 除以 2 的余数 (2) 已知 n 除以 3 的余数