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问题 单项选择题

临产后， * * 检查确诊胎方位时，以哪一条颅缝的方向为准

A．额缝
B．冠状缝
C．矢状缝
D．人字缝
E．额缝

答案

参考答案：C

解析：[解题思路] C 本题主要考核胎位。临产后胎位的标志为矢状缝和囟门。因此选择C。

多项选择题

在IMS域中主要有以下几种业务提供方式：（）。

A.SIP-AS方式

B.Parlay网关

C.智能网

D.核心网内部
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单项选择题

Border Gateway Protocol(BGP) is inter-autonomous system （1） 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 （2）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 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 defining the path that leads to that（3）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 （4）. routing is also not a good candidate for inner-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 （5） using the Dijkstra algorism.

（2）是（）

A.path

B.hop

C.route

D.packet
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