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【多选题】
关于建筑安装工程概算定额与概算指标的区别,下列说法中正确的有()。A.
概算定额以单位工程为对象，概算指标以单项工程为对象
B.
概算定额以预算定额为基础，概算指标主要来自各种预算和结算资料
C.
概算定额适用于初步设计阶段，概算指指标不适用于初步设计阶段
D.
概算指标标比概算定额更加综合与扩大
E.
概算定额是编制概算指标的依据
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