根据提供的首字母或句意将短文补充完整。

     Beijing is the (1)c            of China. People are always trying to make it better.

     In 2001, news came that Beijing would (2)h             the 2008 Olympic Games. People began to work

even harder to (3)i             the environment.

     Today there are more roads and tall (4)b            . When you walk around, you can see more trees, grass

and flowers. You can also find cleaner streets. When you (5)             up, you often see a blue (6)           

 and white clouds. Beijing is becoming more and more beautiful.

     In (7)            , Beijing has changed a lot. We are sure Beijing will have a brighter (8)            .

现实世界中随机性多于确定性。在计算机上模拟随机的实际问题，并进行统计计算，这是非常有用的方法。为此，各种程序设计语言都有产生(伪)随机数的函数。这种函数，每调用一次，就可以获得一个位于区间(0，1)内的数。在程序运行时，多次产生的这些数会均匀地分布在0、1之间。在区间(0，1)内均匀分布的含义是指任取N个随机数，当N足够大时，______。应用人员可以利用这种随机数来生成满足指定概率分布的数据，并利用这些数据来模拟实际问题。

A．随机数大致顺序、等间隔地排列于(0，1)之间
B．随机数从小到大排序后，各个数都分别位于(0，1)的N等分子区间内
C．大致有一半随机数小于1/2，有一半随机数大于1/2
D．其中落在任意子区间(a，b)中的数的比率大致接近于b-a