吸湿滞后性
参考答案：
同样的材料在同样的大气条件下从放湿达到的平衡回潮率大于从吸湿达到的平衡回潮率
A survey of the opinions of experts _____ that three hours of outdoor exercise a week _____ good for
one's health. [ ]
A. show; are
B. shows; is
C. show; is
D. shows; are
下列选项中属于固定式防火分隔设施的是（）。
A．防火门
B．防火墙
C．防火窗
D．防火卷帘
