假设随机变量X服从二项分布B(10,0.1),则随机变量X的均值为( ),方差为( )。
A.1,0.9
B.0.9,1
C.1,1
D.0.9,0.9
参考答案:A
Only since they gave up that good chance___ to show their invention again.
A.have they had no chance
B.they have had no chance
C.they have no chance
D.have they no chance
在精神分析法的辅导关系中,强调辅导员()的角色,以使来访者能将他们的情感投射到辅导员身上。