数据库技术中,数据模型分为概念数据模型和结构数据模型,常用的实体一联系模型(E -R模型)属于 【4】 数型。
参考答案:概念
高渗性缺水多见于()
A.呕吐
B.腹泻
C.持续胃肠减压
D.吞咽困难
E.小肠瘘
SOX is an alternative (156) for XML. It is useful for reading and creating XML content in a (157) editor. It is then easily transformed into proper XML. SOX was created because developers can spend a great deal of time with raw XML. For many of us, the popular XML (158) have not reached a point where their tree views, tables and forms can completely substitute for the underlying (159) language. This is not surprising when one considers that developers still use a text view, albeit enhanced, for editing other languages such as Java. SOX uses (160) to represent the structure of an XML document, which eliminates the need for closing tags and a number of quoting devices. The result is surprisingly clear.
(159)是()
A.programming
B.command
C.markup
D.interactive