长期应用氯丙嗪出现的肌肉僵直、震颤和运动困难是由于阻滞了

A．脑干网状结构上行激活系统α受体
B．黑质-纹状体通路D₂受体
C．结节—漏斗通路D₂受体
D．中脑边缘和中脑皮层通路的D₂受体
E．M胆碱受体

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