单项选择题
A.2 B.5 C.7 D.10
A.主要是阻挡底下潮气向上渗透的构造层 B.绝热层是隔离层 C.用于地面阻挡热量传递的构造层 D.没有热量的构造层
A.1/2~1/3 B.1/2~2/3 C.1/3~2/3 D.1/4~3/4
A.0.2~0.4MPa B.0.4~0.8MPa C.0.8~1.0MPa D.1.0~1.2MPa
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