Border Gateway Protocol(BGP) is inter-autonomous system ______ protocol. BGP is based ona routing method called path vector routing. Distance vector routing is not a good candidate for inter-autonomoussystem routing because there are occasions on which the route with the smallest ______ count is not thepreferred route. For example, we may not want a packet through an autonomous system that is not secure eventhough it is shortest route. Also, distance vector routing is unstable due to the fact that the routers announce onlythe number of hop counts to the destination without defining the path that leads to that ______. A router thatreceives a distance vector advertisement packet may be fooled if the shortest path is actually calculated throughthe receiving router itself. Link ______ routing is also not a good candidate for inner-autonomous system routingbecause an internet is usually too big for this routing method. To use link state routing for the whole internetwould require each router to have a huge link state database. It would also take a long time for each router tocalculate its routing ______ using the Dijkstra algorism.

A．path

B．hop

C．route

D．packet

在V821销售管理模块中，下面关于销售统计表毛利成本分析不正确的是（）

A.所有业务数据都没问题，但可能月中查询销售统计表时成本较大毛利为负数；

B.出现销售统计表成本数据不符的主要原因是由于“销售出库单”在存货系统已审核，但在销售系统中发货单还未生成“销售发票”，从而造成销售与成本不匹配；

C.销售统计表的数据来源：销售数量、金额数据来自销售发票、销售调拨单、零售日报及其对应的红字单据；销售成本数据来自存货核算系统的存货明细账；

D.销售成本只有到存货核算系统月末结账后才能取得准确的数据。