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
The wealth of a country should be measured ________ the health and happiness of its people as well as the material goods it can produce.
Sorry sir, we don't have wine or beer. We are only licensed to sell _______ drinks.
我国对资本主义工商业的社会主义改造基本完成的标志是 _______。
关于过渡时期总路线的表述正确的是 ______。
To succeed in a scientific research project ________.