婴幼儿胸围与头围大致相等的时间是（） A.6个月 B.2岁 C.1岁 D.出生 E.

左卵巢动脉来自（）

A.髂总动脉

B.肾动脉

C.髂外动脉

D.髂内动脉前干分支

E.髂内动脉前干终支

（1）6本不同的书平均分成三堆，有多少种分堆方法？

（2）6本不同的书分成3本、2本、1本的三堆，有多少种分堆方法？

（3）7本不同的书分成3本、2本、2本的三堆，有多少种分堆方法？

（4）7本不同的书分成3本、2本、2本的三堆，并送给A、B、C三人，有多少种送法？

Border Gateway Protocol (BGP) is inter-autonomous system (71) protocol. BGP is based on a routing method called path vector routing. Distance vector routing is not a good candidate for inter-autonomous system routing because there are occasions on which the route with the smallest (72) count is not the preferred route. For example, we may not want a packet through an autonomous system that is not secure even though it is the shortest route. Also, distance vector routing is unstable due to the fact that the routers announce only the number of hop counts to the destination without actually defining the path that leads to that (73) . A router that receives a distance vector advertisement packet may be fooled if the shortest path is actually calculated through the receiving router itself. Link (74) routing is also not a good candidate for inter-autonomous system routing because an internet is usually too big for this routing methoD. To use link state routing for the whole internet would require each router to have a huge link state database. It would also take a long time for each router to calculate its routing (75) using the Dijkstra algorism.

（73）是（）

A.connection

B.window

C.source

D.destination

一个函数功能不太复杂，但要求被频繁调用，选用 ______。

A．内联函数

B．重载函数

C．递归函数

D．嵌套函数