下列哪种改变不属于代偿性肥大？（）

A.妊娠子宫肥大

B.由于肺动脉阻力增大引起的右心室肥大

C.一侧肾切除，另一侧肾肥大

D.由于主动脉阻力增大引起的左心室肥大

E.二尖瓣狭窄引起的左心房的肥大

Virtualization is an approach to IT that pools and shares（）so that utilization is optimized and supplies automatically meet demand. Traditional IT environments are often silos, where both technology and human（）are aligned around an application or business function. With a virtualized（）, people, processes, and technology are focused on meeting service levels，（）is allocated dynamically, resources are optimized, and the entire infrastructure is simplified and flexible. We offer a broad spectrum of virtualization（）that allows customers to choose the most appropriate path and optimization focus for their IT infrastructure resources.

With a virtualized（）

A．system

B．infrastructure

C．hardware

D．link