Open Shortest Path First(OSPF)is a (29) routing algorithm that (30) work done on the OSI IS-IS intradomain routing protocol. This routing, as compared to distance-vector routing, requires (31) processing power. The Dijkstra algorithm is used to calculate (32) OSPF routing table updates only take place when necessary, (33) at regular intervals.

29（）

A．distance-vector

B．link-state

C．flow-based

D．selective flooding

区别有权威的政府与无权威的政府的根本标志是[ ]

A．政府的官员是否由人民选举产生的

B．人民是否完全听从和畏惧政府的管理

C．政府的管理是否被人民自觉认可和服从

D．政府是否站在每一公民的利益立场上