江苏省委十一届十二次全委会确定新时期江苏精神由“三创”深化拓展为“三创三先”。 “三创三先”指的是[ ]

A．创业；创新；创优；争先；领先；率先

B．创业；创造；创优；争先；领先；率先

C．创业；创造；创优；争先；优先；率先

D．创业；创新；创优；争先；抢先；率先

Multipurpose Internet Mail Extension (MIME) is a (46) document messaging standard in the Internet enviroment, with MIME, users can send (47) Email messages that include audio, video, graph-ices, and text to any other user of a TCP/IP network. Richtext information can also be (48) into messages. It defines the fonts, formats, and (49) features of a document so the document can be easily (50) on many different types of systems.

A．incorporated

B．filled

C．stored

D．flied