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问题 填空题

已知△ABC与△DEF相似且对应中线之比为3：4，则△ABC与△DEF的周长之比为______．

答案

∵△ABC与△DEF相似且对应中线之比为3：4，

∴△ABC与△DEF的相似比为3：4，

∴△ABC与△DEF的周长之比为：3：4．

故答案为：3：4．

单项选择题 A1/A2型题

关于社区预防的基本概念，错误的是（）。

A.保护居民健康是政府的职责，属于社区预防

B.疾病预防属于群体预防

C.社区筛检属于群体预防

D.疾病筛检属于个体预防

E.健康咨询属于个体预防
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单项选择题

The Simple Network Management Protocol (SNMP)is an (66) protocol that facilitates the exchange of management information between (67) . It is part of the Transmission Control Protocol/Internet Protocol(TCP/IP) protocol suite. SNMP enables network (68) to manage network performance, find and sole network problems, and plan for (69) An SNMP -managed network consists of three key components: managed devices , (70) ,and network -management systems .

A. network stations B. network clients C. network devices D. network servers
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