一台混凝土搅拌机一次延续时间为 120s （包括上料、搅拌、出料时间），一次生产混凝土 0.2m3 ，一个工作班的纯工作时间为 4h, 该搅拌机的正常利用系数和产量定额为（    ）。

A、<span style="FONT-FAMILY: " times="" new="" roman","serif";="" font-size:="" 12pt;="" mso-font-kerning:="" 1.0pt;="" mso-ansi-language:="" en-us;="" mso-fareast-language:="" zh-cn;="" mso-bidi-language:="" ar-sa;="" mso-fareast-font-family:="" 宋体"="" lang="EN-US">0.5</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; 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;="" mso-ascii-font-family:="" "times="" mso-hansi-font-family:="" roman""="">；</span><span style="FONT-FAMILY: " times="" new="" roman","serif";="" font-size:="" 12pt;="" mso-font-kerning:="" 1.0pt;="" mso-ansi-language:="" en-us;="" mso-fareast-language:="" zh-cn;="" mso-bidi-language:="" ar-sa;="" mso-fareast-font-family:="" 宋体"="" lang="EN-US">48</span>

B、<span style="FONT-FAMILY: " times="" new="" roman","serif";="" font-size:="" 12pt;="" mso-font-kerning:="" 1.0pt;="" mso-ansi-language:="" en-us;="" mso-fareast-language:="" zh-cn;="" mso-bidi-language:="" ar-sa;="" mso-fareast-font-family:="" 宋体"="" lang="EN-US"><span style="mso-spacerun: yes"></span>2</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; 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;="" mso-ascii-font-family:="" "times="" mso-hansi-font-family:="" roman""="">；</span><span style="FONT-FAMILY: " times="" new="" roman","serif";="" font-size:="" 12pt;="" mso-font-kerning:="" 1.0pt;="" mso-ansi-language:="" en-us;="" mso-fareast-language:="" zh-cn;="" mso-bidi-language:="" ar-sa;="" mso-fareast-font-family:="" 宋体"="" lang="EN-US">48</span>

C、<span style="FONT-FAMILY: " times="" new="" roman","serif";="" font-size:="" 12pt;="" mso-font-kerning:="" 1.0pt;="" mso-ansi-language:="" en-us;="" mso-fareast-language:="" zh-cn;="" mso-bidi-language:="" ar-sa;="" mso-fareast-font-family:="" 宋体"="" lang="EN-US">0.5</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; 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;="" mso-ascii-font-family:="" "times="" mso-hansi-font-family:="" roman""="">；</span><span style="FONT-FAMILY: " times="" new="" roman","serif";="" font-size:="" 12pt;="" mso-font-kerning:="" 1.0pt;="" mso-ansi-language:="" en-us;="" mso-fareast-language:="" zh-cn;="" mso-bidi-language:="" ar-sa;="" mso-fareast-font-family:="" 宋体"="" lang="EN-US">24</span>

D、<span style="FONT-FAMILY: " times="" new="" roman","serif";="" font-size:="" 12pt;="" mso-font-kerning:="" 1.0pt;="" mso-ansi-language:="" en-us;="" mso-fareast-language:="" zh-cn;="" mso-bidi-language:="" ar-sa;="" mso-fareast-font-family:="" 宋体"="" lang="EN-US"><span style="mso-spacerun: yes"></span>2</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; 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;="" mso-ascii-font-family:="" "times="" mso-hansi-font-family:="" roman""="">；</span><span style="FONT-FAMILY: " times="" new="" roman","serif";="" font-size:="" 12pt;="" mso-font-kerning:="" 1.0pt;="" mso-ansi-language:="" en-us;="" mso-fareast-language:="" zh-cn;="" mso-bidi-language:="" ar-sa;="" mso-fareast-font-family:="" 宋体"="" lang="EN-US">24</span>