__________ panda is from China; __________ lions come from Africa.
A:The; the
B:A; the
C:The; /
D:/; the
(Ⅰ)求第一轮闯关成功的概率;
(Ⅱ)如果第i轮闯关成功所获的奖金数f(i)=10000× 12i (单位:元),求某人闯关获得奖金不超过1250元的概率;
(Ⅲ)如果游戏只进行到第四轮,第四轮后不论游戏成功与否,都终止游戏,记进行的轮数为随机变量X,求x的分布列和数学期望.
As we know, his father is a very famous scientist in physics. But what you don't know is that he _______ as a farmer for five years.