第4题: [单项选择]假设生产管理网络系统采用:B/S工作方式,经常上网用户数为150个,每用户每分钟产生8个事务处理任务,平均事务量大小为0.05MB,则这个系统需要的信息传输速率为______。 A. 4Mbps B. 6Mbps C. 8Mbps D. 12Mbps 参考答案:C 答案解析:[解析] 应用总信息传输速率=平均事务量大小×每字节位数×每个会话事务数×平均用户数/平均会话长度。本题中,平均事务量大小=0.05MB,每字节位数=8,平均用户数=150, 每个会话事务数=8,平均
第7题: [单项选择]Why did the speaker ask the people to leave the building as quickly as possible A. Because a fire started in the building. B. Because a robbery would happen soon. C. Because electricity went out in the building. 参考答案:A 答案解析:[听力原文]8-9
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第8题: [单项选择]机翼漏气将导致() A. 相关的引气活门自动关闭,空调面板上,相应的失效灯亮 B. 交叉引气活门自动关闭(发动机起动时例外) C. 以上都对 参考答案:C