早期的网络操作系统经历了由______结构向非对等结构的过渡。
参考答案：对等
解析： 早期的网络操作系统经历了由对等结构向非对等结构的过渡。
Which of the following statement about the normal distribution is FALSE()
A. It is completely described by its mean and standard deviation.
B. It has a skewness of 1.
C. It is bell-shaped.
何谓变形缝
