Some great people said it was their primary school teachers and their lessons _____ _____

they were fond of influenced their whole lives.[ ]

A. which; that

B. that; which

C. which; which

D. that; that

对电气主接线的要求有（）。

A.具有供电的可靠性；

B.具有运行上的安全性和灵活性；

C.简单、操作方便；

D.具有建设及运行的经济性。