一种最常用的统计量，能表示一组数据的集中程度，这指的是
A.平均数
B.百分数
C.百分率
D.中位数
正确答案是A
在项目范围验收基准中，（ ）定义了交付成果与工作包的逻辑关系。
Confucius No other philosopher in the world has had more enduring influence than Confucius. For over two thousand years, his concept of government, and his ideas about personal cond
