隐蔽性失业
Which statement correctly describes a situation in which VRFs are used in the data center?（） [" Partitioning of network resources is enabled."," VRFs cannot support path isolation from MAN\/WAN designs."," VRFs cannot be used to map a virtualized data center to a MPLS implementation."," VRFs do not allow for the use of application services with multiple access topologies."," An access design using a VRF allows for an aggregation layer service module solution."]
文字是能指实际上就是（）。
知识有两个十分重要的特性：一是知识的（），二是知识的无限增殖性。
界刺激与主体反应的关系不是简单的S-→R，而是S→AT→R， AT是主体同化刺激S于结构T的结果，A是大于1的系数。这是（）提出的学习的心理过程。 ["皮亚杰","赫尔巴特","奥苏贝尔","班杜拉"]
计算投资报酬率时，其经营资产计价是采用（）。
