在数据库应用系统设计过程中，不属于概念设计范畴的是______。A_爱下问搜题

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问题单项选择题

在数据库应用系统设计过程中，不属于概念设计范畴的是______。

A．应用软件结构设计

B．关键技术方案初．步没计

C．模块使用的数据结构设计

D．确定DBAS体系结构

答案

参考答案：C

解析：概念设计包括数据概念模型设计和系统总体设计。系统总体设计的内容： (1) 确定DBAS体系结构。 (2) 系统硬件平台和操作系统、数据库管理系统等系统软件的选型和配置。 (3) 应用软件结构设计。 (4) 对需求分析阶段识别出的业务规则进行初步设计，细化业务规则流程，分析所处理的业务数据和处理方式，明确采用的关键技术和算法等。 (5) 对系统采用的关键技术进行方案选型和初步设计。所以本题的答案为C。

填空题

Beijing: The United States and North Korea had their first ________in four months here this afternoon as part of the ________negotiations on how to end North Korea’’s nuclear program, but diplomats played down prospects for________.James A. Kelly, assistant________, and Kim Yong II, North Korea’’s deputy foreign minister, met ________of formal discussions, ________on direct dialogue that began after a stormy meeting ________in which North Korea warned that it was moving quickly to ________nuclear arms.The Bush administration had insisted ________that it would only hold talks with North Korea ________because, it argued, only ________pressure would persuade North Korea to________. It got its way when North Korea dropped its insistence on ________and agreed, after extensive efforts by China, to hold unusual simultaneous negotiations with ________,________,________and ________as well as the United States.Though Bush administration officials had not ________talking privately with the North Koreans during________, the fact that Mr. Kelly and Mr. Kim met on the first day was seen as a sign of ________by the American side.

问答题简答题

采用哪些措施可减少辅助时间？