一个完整的物流信息系统的结构是( )。

A．信息采集一简单处理一传输一处理一决策一传输

B．信息采集一传输一简单处理一处理一传输一决策

C．信息采集一简单处理一处理一传输一决策一传输

D．信息采集一简单处理—传输一决策一处理一传输

In the following essay, each blank has four choices. Choose the most suitable one from the four choices and write down in the answer sheet.

Open Shortest Path First (OSPF) is a (1) routing algorithm that (2) work done on the OSI IS-IS intradomain routing protocol. This routing, as compared to distance-vector routing, requires (3) processing power. The (4) algorithm is used to calculate routes. OSPF routing table updates only take place when necessary, (5) at regular intervals.

3（）

A．more

B．less

C．same

D．most