Virtualization is an approach to IT that pools and shares（71）so that utilization is optimized and supplies automatically meet demand．Traditional IT environments are often silos, where both technology and human（72）。 are aligned around an application or business function．With a virtualized （73），people, processes, and technology are focused on meeting service levels, （74） is allocated dynamically, resources are optimized, and the entire infrastructure is simplified and flexible．We offer a broad spectrum of virtualization（75）that allows customers to choose the most appropriate path and optimization focus for their IT infrastructure resources．

72（）

A．profits

B．costs

C．resources

D．powers

中国加入世界贸易组织具有重大意义，表现在______。

A．有利于实现全方位、多层次的对外开放
B．有利于国际贸易环境的改善
C．有利于对外贸易摩擦和纠纷的解决，以维护我方的合法利益
D．推动我国企业直接参与国际竞争