有以下哪个标识的,不一定是借记卡?()
A. CIRRUS
B. VISA Electron
C. Mastro
D. 银联标识
格里高利圣咏(GregorianCantus)的形成?
What is the best description of serialization delay? ()
A. the time it takes for a Layer 3 switch or a router to switch a packet from an inbound interface to the queue of the outbound interface
B. the time it takes for a propagate from source to destination
C. the time it takes to place a frame on the physical medium for transport
D. the time a packet resides in the outbound queue of a router
国际经验显示,保险机构属于较谨慎的机构投资者,其选择投资对象时( )。
A. 青睐规模较大,历史上没有出现太大风险,每年均能获得红利回报的企业
B. 着重规模较大、成长性的企业
C. 注意小型的、历史悠久的企业,希望获得较高的回报
D. 注重高科技、环保性符合国家产业政策的企业