It knowledge is power,    ______Sir Francis Bacon wrote in 1579,   ______perhaps creativity ca be described as the ability to use that power.

A．what; and

B．as; then

C．which; and

D．that; then

ITC提供软件服务主要包括（）

A.网络应用集成

B.网络应用外包

C.通信业务系统

D.冗灾备份服务