下列哪项分布的资料，均数等于中位数（）
A.对称
B.左偏态
C.右偏态
D.对数正态
E.以上均不是
参考答案：A
用所给单词的适当形式填空.
1. Miss Lee had us______ (use)a knife ______ (carve)a pumpkin.
2. She asked us______ (cut) open a pumpkin.
3. They decided______ (leave) at the end of this month.
4. People called the boy Jesus Christ because Christ_______ ( mean) saving.
5. The teacher made him______ (finish) homework on time.
发展型组织中组织结构的变化主要体现在哪些地方？
