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单项选择题

对框架结构作抗震变形验算时，下列说法正确的是( )。

A.结构的层间弹性位移限值与结构的层高有关
B.结构的层间弹性位移限值与结构的层高无关
C.结构的层间弹性位移限值与结构的总高有关
D.结构的层间弹性位移限值与建筑的装修标准有关
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根据《水运工程混凝土试验规程》UTJ270-98）,在进行岩石抗压强度试验前,应将试件置于水中浸泡,水面应至少高出试件顶面（ ）mm。
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用未经焙烧的土坯、灰土和夯土作承重墙体的房屋及土窑洞、土拱房，只能用于( )。
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