SOX is an alternative syntax for (71) . It is useful for reading and creating XML content in a text 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 (72) have not reached a point where their tree views, tables and forms can completely substitute for the underlying. (73) language. This is not surprising when one considers that developers still use a (74) view, albeit enhanced, for editing other languages such as Java. SOX uses (75) 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.

A．tags

B．cookies

C．editors

D．creators

案例二

[背景材料]

中国人民解放军某空军部队，拟在与蒙古接壤的二连浩特市建设一雷达生产厂，经国家有关部门批准后，开始对本项目筹集资金和施工图设计，该项目资金由自筹资金和银行贷款两部分组成，自筹资金已全部到位，银行贷款预计在2007年7月30日到位，2007年3月 18日设计单位完成了初步设计图纸，2007年3月20进入施工图设计阶段。预计5月8日完成施工图设计，该空军部队考虑到该项目要在年底前竣工遂决定于3月19日进行施工招标。施工招标采用邀请招标方式，并于3月20日向与其合作过的施工单位中选择了两家发出了投标邀请书。

[问题]

建设工程施工招标的必备条件有哪些？