It was not until I came here ________ I realized this place was famous for not only its beauty but also its weather.(2012·湖南)

A．who

B．that

C．where

D．before

如图表示细胞内发生的一系列重大生命活动，请据图回答下列问题：

B过程表示一个细胞增殖的后代，在形态、结构和功能上发生（）的过程。