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耐火等级为一级的一般民用建筑，其位于两个外部出口或楼梯之间的房间门至外部出口或封闭楼梯间的距离最大不应超过（ ）

单选题
2021-07-17 23:51
A、<span lang="EN-US" style="FONT-SIZE: 10pt; 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-fareast-font-family:="" 宋体"="">42</span>
B、<span lang="EN-US" style="FONT-SIZE: 10pt; 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-fareast-font-family:="" 宋体"="">40</span>
C、<span lang="EN-US" style="FONT-SIZE: 10pt; 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-fareast-font-family:="" 宋体"="">45</span>
D、<span lang="EN-US" style="FONT-SIZE: 10pt; 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-fareast-font-family:="" 宋体"="">47</span>
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B
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标签： 土木工程 专升本 房屋建筑设备 2020年第二学期补考
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