定语从句中from where和 from which怎么区分?

问题描述:

定语从句中from where和 from which怎么区分?
不是说form which=where吗?
有什么不一样的?最好能举例说明.

from where应该不是定语从句,是状语从句(除非from是接前面句子的词组)We have our own office in Shanghai from where we coordinate the production,planning,quality and transport of all our products and mou...