这是什么从句?Police dispersed the crowd (that) had gathered around the building.Police dispersed the crowd (that) had gathered around the building.请问这是定语从句吗? 为什么不用who来引导呢? Police dispersed the crowd (who) had gathered around the building.

问题描述:

这是什么从句?Police dispersed the crowd (that) had gathered around the building.
Police dispersed the crowd (that) had gathered around the building.

请问这是定语从句吗? 为什么不用who来引导呢?
Police dispersed the crowd (who) had gathered around the building.