根据右图回答下列问题:
右下图表示的是()免疫过程,其中a表示的是()细胞,c表示的是()细胞,b表示的是()细胞。
参考答案:体液;B细胞;记忆细胞;效应B细胞
______ of danger in the street at night by police, young women had to go home with a friend or a family member ______ them.
A.Having been warned; following
B.warning; following
C.Having warned; following
D.warned; followed
决策制定者的心理导向影响决策的不确定性水平。()