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问题 解答题

家猫的寿命大约是12岁，兔子的寿命比家猫短46%，兔子的寿命大约是多少岁？（得数保留整数）

答案

12×（1-46%），

=12×54%，

≈6（岁）；

答：兔子的寿命大约是6岁．

单项选择题

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.

（71）是（）

A.routing

B.switching

C.transmitting

D.receiving
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单项选择题

患者，女，32岁，已婚。妊娠2个月，近日因恶阻而恶心呕吐，呕吐酸苦水，不能进食，胸满胁痛，舌红苔黄，脉弦滑。其证候是（）

A.肝胃不和

B.胃虚

C.胃热

D.痰滞

E.以上均非
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