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问题 单项选择题 案例分析题

女孩，2岁。反复喘息发作4次，对花粉过敏，其父年幼时有哮喘病史。

该患儿3岁以后仍发复哮喘发作，若对吸入小剂量激素有效，应选择长期吸入，时间为（）

A.1周

B.1月

C.3月

D.5月

E.6月～2年或更长

答案

参考答案：E

问答题 简答题

进行滴定分析，必须具备以下几个条件？
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单项选择题

One of the most widely used routing protocols in IP networks is the Routing Information Protocol (RIP). RIP is the canonical example of a routing protocol built on the (71) algorithm. Routingprotocols in internetworks differ slightly from the idealized graph model. In an internetwork, the goal ofthe routers to forward (72) to various networks.
Routers running RIP send their advertisement abOLit cost every (73) seconds. A router also sends an up date message whenever an update from another router causes it to change its routing table.
Routing protocols use different techniques for assigning (74) to individual networks. Further, each routing protocol forms a metric aggregation in a different way. RIP takes the simplestapproach, with all link costs being equal (75) . Thus it always tries to find the minimum hop route. Valid distances are 1 through 15. This also limits RIP to running on fairly small networks.

A．1
B．15
C．16
D．length of the link
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