关于定语从句的语法问题

Question

The drawing vividly depicts that many people are working or playing on computers, who have been divided into a small cube in a circular area.
请问：
1.who have been divided into a small cube in a circular area 应该是非限制性定语从句，修饰many people，是吗。为什么不是跟在many people 后面？
2.可不可以改成The drawing vividly depicts that many people who have been divided into a small cube in a circular area are working or playing on computers.
或者The drawing vividly depicts that many people, who have been divided into a small cube in a circular area, are working or playing on computers.
谢谢！

Answer 1

答：本题句由考研范文改编而来，因有问题，我才去找的。范文句是：
一篇考研英语的范文The drawing vividly depicts that in a circular area which can be divided into some sub-sections, there is one person in each, working or playing on a computer.
这句话，意思明确。逻辑正确。而你的这句话，是语法正确，逻辑错误的：
The drawing vividly depicts that many people are working or playing on computers, who have been divided into a small cube in a circular area.
析： 原句可能是一个看图作文。意思是一幅图画中有一个环形的区域，这个区域被分成了一些较小的部分（sub-sections),在第一个小区域中（不一定是方型也不一定是圆型）都有一个人在一台电脑上工作或游戏。
而原题句中的who指many poeple, 被分成小的cube“立方体”，这是不合逻辑的。
我找到的还有一个版本是：
The drawing vividly depicts that a circular area has been divided into a number of sub-sections, and there is one person in each sub-section, working or playing on a computer.

Answer 2

因为这个定语从句太长了，在英语中，为了避免头重脚轻，把比较长的定语从句放后面。
你所改的第一种方法是对的。也就是把一个非限定性定语从句改成了一个普通的定语从句。至于最后一种情况，我不清楚你为什么要加上两个逗号，是怕一口气读不下了吗？追问

我就是想知道语法上有没有错？我看语法书，有这样一个句子
All these books, which had been donated by visiting professors, are to be used by the postgraduates.不也是有两个逗号。而这个句子的定语从句紧跟在修饰的these books 后面。

追答

哦，我知道了，你看，他这么一断，不就变成非限定性定语从句了吗？
也是对的。