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【单选题】
某框架结构为乙类建筑,总高为23米,所处地区为III类场地,抗震设防烈度为7度,设计基本地震加速度为0.15g,则框架抗震措施的抗震等级和抗震构造措施的抗震等级分别为A.
抗震措施、抗震构造措施的抗震等级均是二级
B.
抗震措施、抗震构造措施的抗震等级均是一级
C.
抗震措施的抗震等级是二级、抗震构造措施的抗震等级是一级
D.
抗震措施的抗震等级是一级、抗震构造措施的抗震等级是二级
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【单选题】产量变动之所以影响产品单位成本,是因为( )。
A.
在产品全部成本中包括了一部分变动费用
B.
在产品全部成本中包括了一部分相对固定费用
C.
产品总成本不变
D.
产品产量增长小于产品总成本增长
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