单选题确定围护结构最小传热阻公式中，在选择冬季室外计算温度值时，按热惰性指标将围护结构分成（）类。A2B3C4D5
单选题
确定围护结构最小传热阻公式中，在选择冬季室外计算温度值时，按热惰性指标将围护结构分成（）类。
A
2
B
3
C
4
D
5
参考解析
解析：
在保温设计中计算最小传热阻时，按热惰性指标将围护结构分成四类。
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