one of them ,one of whom 区别

问题描述:

one of them ,one of whom 区别

one of them ------用于简单句
I have got quite a few friends, and Tom is one of them.
,one of whom -------用于定语从句
I have got quite a few friends, and Tom is one of them.-----------
I have got quite a few friends, Tom is one of whom====I have got quite a few friends,of whom Tom is one.