设随机变量(X,Y)服从二维正态分布N(0,0;1,4;-1/2),随机变量中服从标准正态分布且与X独立的是()
C
设向量组线性无关,则下列向量组线性相关的是()
Senior members of the staff competed eagerly ________ the position of sales manager in the company.
The director recommended that she ________ (study) more English before going abroad.
党在“过渡时期总路线” 中提到的“过渡”是指从 ___________。
希腊化时代系统论述 "人生而平等 "的哲学派别是 ()