8 位无符号数表示数的范围是 ________ 。

A、<span style="FONT-FAMILY: " times="" new="" roman","serif";="" color:="" black;="" font-size:="" 10.5pt;="" mso-bidi-font-size:="" 12.0pt;="" mso-fareast-font-family:="" 宋体;="" mso-font-kerning:="" 1.0pt;="" mso-ansi-language:="" pt-br;="" mso-fareast-language:="" zh-cn;="" mso-bidi-language:="" ar-sa"="" lang="PT-BR">0</span><span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: PT-BR; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: " times="" new="" roman";="" mso-hansi-font-family:="" "times="" mso-bidi-font-family:="" roman""="">～</span><span style="FONT-FAMILY: " times="" new="" roman","serif";="" color:="" black;="" font-size:="" 10.5pt;="" mso-bidi-font-size:="" 12.0pt;="" mso-fareast-font-family:="" 宋体;="" mso-font-kerning:="" 1.0pt;="" mso-ansi-language:="" pt-br;="" mso-fareast-language:="" zh-cn;="" mso-bidi-language:="" ar-sa"="" lang="PT-BR">255</span>

B、<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: PT-BR; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: " times="" new="" roman";="" mso-hansi-font-family:="" "times="" mso-bidi-font-family:="" roman""="">－</span><span style="FONT-FAMILY: " times="" new="" roman","serif";="" color:="" black;="" font-size:="" 10.5pt;="" mso-bidi-font-size:="" 12.0pt;="" mso-fareast-font-family:="" 宋体;="" mso-font-kerning:="" 1.0pt;="" mso-ansi-language:="" pt-br;="" mso-fareast-language:="" zh-cn;="" mso-bidi-language:="" ar-sa"="" lang="PT-BR">127</span><span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: PT-BR; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: " times="" new="" roman";="" mso-hansi-font-family:="" "times="" mso-bidi-font-family:="" roman""="">～＋</span><span style="FONT-FAMILY: " times="" new="" roman","serif";="" color:="" black;="" font-size:="" 10.5pt;="" mso-bidi-font-size:="" 12.0pt;="" mso-fareast-font-family:="" 宋体;="" mso-font-kerning:="" 1.0pt;="" mso-ansi-language:="" pt-br;="" mso-fareast-language:="" zh-cn;="" mso-bidi-language:="" ar-sa"="" lang="PT-BR">127</span>

C、<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: PT-BR; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: " times="" new="" roman";="" mso-hansi-font-family:="" "times="" mso-bidi-font-family:="" roman""="">－</span><span style="FONT-FAMILY: " times="" new="" roman","serif";="" color:="" black;="" font-size:="" 10.5pt;="" mso-bidi-font-size:="" 12.0pt;="" mso-fareast-font-family:="" 宋体;="" mso-font-kerning:="" 1.0pt;="" mso-ansi-language:="" pt-br;="" mso-fareast-language:="" zh-cn;="" mso-bidi-language:="" ar-sa"="" lang="PT-BR">128</span><span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: PT-BR; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: " times="" new="" roman";="" mso-hansi-font-family:="" "times="" mso-bidi-font-family:="" roman""="">～＋</span><span style="FONT-FAMILY: " times="" new="" roman","serif";="" color:="" black;="" font-size:="" 10.5pt;="" mso-bidi-font-size:="" 12.0pt;="" mso-fareast-font-family:="" 宋体;="" mso-font-kerning:="" 1.0pt;="" mso-ansi-language:="" pt-br;="" mso-fareast-language:="" zh-cn;="" mso-bidi-language:="" ar-sa"="" lang="PT-BR">127</span>

D、<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: PT-BR; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: " times="" new="" roman";="" mso-hansi-font-family:="" "times="" mso-bidi-font-family:="" roman""="">－</span><span style="FONT-FAMILY: " times="" new="" roman","serif";="" color:="" black;="" font-size:="" 10.5pt;="" mso-bidi-font-size:="" 12.0pt;="" mso-fareast-font-family:="" 宋体;="" mso-font-kerning:="" 1.0pt;="" mso-ansi-language:="" pt-br;="" mso-fareast-language:="" zh-cn;="" mso-bidi-language:="" ar-sa"="" lang="PT-BR">128</span><span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: " times="" new="" roman";="" mso-hansi-font-family:="" "times="" mso-bidi-font-family:="" roman""="">～</span><span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: PT-BR; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: " times="" new="" roman";="" mso-hansi-font-family:="" "times="" mso-bidi-font-family:="" roman""="">＋</span><span style="FONT-FAMILY: " times="" new="" roman","serif";="" color:="" black;="" font-size:="" 10.5pt;="" mso-bidi-font-size:="" 12.0pt;="" mso-fareast-font-family:="" 宋体;="" mso-font-kerning:="" 1.0pt;="" mso-ansi-language:="" pt-br;="" mso-fareast-language:="" zh-cn;="" mso-bidi-language:="" ar-sa"="" lang="PT-BR">128</span>