单选题
发布日期:2021-08-10
系统设计
系统分析
系统实施
系统运行
数据流程分析就是把数据在现行系统内部的流动情况抽象出来,舍去了具体组织机构、信息载体、处理工作等物理组成,单纯从数据流动过程来考察实际业务的数据处理模式。数据流程分析主要包括对信息的流动、变换、存贮等的分析。其目的是要发现和解决数据流动中的问题。现有的数据流程分析多是通过分层的数据流程图(data flow diagram,简称DFD)来实现的。
阶段是中国词语,读音是jiēduàn,表示事物发展过程中的区间段落。
属于,动词,归于某一方面;为某一方面所有。如最后的胜利一定属于我们。
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韩东的《山民》是一首()。
五岳是指哪五座山?其特点分别是什么?
Since a particular bookstore happens to resemble a supermarket anyway, the inescapable, though perhaps unintended, message is that books are consumable items, meant to be devoured and forgotten, like potatoes or pizza. The implied inclusion of books among the world’s perishable goods is hardly made more agreeable by the reflection that increasing numbers of books these days do seem to be written with just such consumption in mind, and that most bookstores have become little more than news stands for hard cover publications of this sort, which are merchandised for a few weeks—sometimes only as long as they remain on the best-seller lists—and are then retired to discount store (those jumbled graveyards of books, so saddening to the hearts of authors)shortly before dropping out of print altogether. Books that are planned for rapid oblivion probably make some kind of economic sense to publishing houses, but as contribution to literature they amount to a contradiction in terms.
穿时装是一种挑战,是一次经济实力的亮相,是交友或谈生意时递给对方的一张无声的烫金名片。选用了()辞格。
患儿男,6岁。5天前眼睑水肿,波及全身,出现全身凹陷性水肿。WBC9×109/L,N65%,L35%,Hb95g/L。尿蛋白(++++),白细胞0~3个/HP。补体C3正常。根据病史和实验室检查可初步诊断为()
下列不属于尿道损伤的病理类型的是( )。
为了保证ADSL的稳定性,ADSL的噪声容限上行和下行需为()。
下面信号属于遥信的是()。
心理卫生起始阶段是
失事后造成损失不大的水利水电工程的1~4级主要永久性水工建筑物,经过论证并报主管部门批准,其级别可()。
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