The World Wide Web is the（）to allow users to browse from one（）to another and to inspect the information available without using complicated commands and protocols.

A.information system

B.Internet site

C.net system

D.Internet

建设项目施工公开招标程序中，紧接“发售招标文件”之后的程序是( )。

A．资格审查
B．开标
C．现场考察
D．定标