设A,B,C为三个随机事件 ,且P(A)=P(B)=P(C)=1/4,P(AB)=0,P(AC)=P(BC)=1/12,则A,B,C中恰有一个事件发生的概率为()
D
________, John has been to several foreign countries.
As you like pop music, __________ I like literature.
党的过渡时期总路线所指的过渡时期是 _________。
曲线，渐近线的条数为（）
Those who’d like to visit the exhibition ________ (sign) your names here.
，渐近线的条数为（）