A、<span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: ">物理层，数据链路层，网络层，传输层，会话层，表示层和应用层</span>
B、<span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: ">物理层，数据链路层，网络层，传输层，系统层，表示层和应用层</span>
C、<span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: ">物理层，数据链路层，网络层，转换层，会话后，表示层和应用层</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: "></span>
D、<span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: ">表示层，数据链路层，网络层，传输层，会话层，物理层和应用层</span>