题目内容

哮喘轻度急性发作时的治疗不正确的是

A. 吸氧
B. 小量茶碱控释片
C. 每日吸入沙丁胺醇
D. 按需吸入特布他林
E. 定时吸入糖皮质激素

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支气管哮喘的临床特征是

A. 吸气性呼吸困难
B. 反复发作的混合性呼吸困难
C. 反复发作的呼气性呼吸困难
D. 夜间阵发性呼吸困难
E. 两肺散在的干湿哕音

肺性脑病病人不能吸入高浓度氧气是因为

A. 缺氧不是主要因素
B. 可引起氧中毒
C. 解除了主动脉体和颈动脉体的兴奋性
D. 促使二氧化碳排除过快
E. 诱发代谢性碱中毒

阻塞性肺气肿最常见的病因是

A. 支气管哮喘
B. 支气管扩张
C. 慢性支气管炎
D. 肺结核
E. 支气管肺炎

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 algorithm. Routing protocols in internetworks differ slightly from the idealized graph model. In an intemetwork, the goal of the routers to forward to various networks.Routers running RIP send their advertisement about cost every seconds. A router also sends an update message whenever an update from another router causes it to change its routing table.Routing protocols use different techniques for assigning to individual networks. Further, each routing protocol forms a metric aggregation in a different way. RIP takes the simplest approach, with all link costs being equal __. 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. 10
B. 30
C. 60
D. 180