----Must I do well in all the subjects, Mum?

----Sure, baby! As an old saying goes, knowledge is _________.

A．command

B．effort

C．power

D．energy

难以随机应变，所收集信息的范围有限的面试类型是（）

A初步面试

B结构化面试

C诊断面试

D非结构化面试