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问题 单项选择题

妊娠合并肝炎的诊断，下列哪项是正确的

A．妊娠期ALT升高即可诊断

B．可疑妊娠合并肝炎患者，产后如肝功能很快恢复正常即可诊断

C．妊娠期ALT升高伴有呕吐即可诊断

D．以上都不正确

E．妊娠期出现黄疸即可诊断

答案

参考答案：D

多项选择题

社区建立的支援网络主要包括（）。

A.互助网络

B.街道网络

C.个人网络

D.邻居协助网络

E.志愿者联系网络
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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.

（72）是（）

A.path

B.hop

C.route

D.packet
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