[求助]三种主流技术标准,在线等

lily6189

<span style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;"><strong>三代移动通信系统经过多年探索研究和发展，形成了<span style="COLOR: red;">（<span lang="EN-US">&nbsp;&nbsp; </span></span>）、（<span lang="EN-US">&nbsp;&nbsp; </span>）和（<span lang="EN-US">&nbsp;&nbsp; </span>）等三种主流技术标准</strong></span>