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【单选题】
对于回弹法测定混凝土强度，以下说法正确的是。
A.
适应于达到凝结硬化的所有混凝土
B.
对于遭受火灾后的混凝土，只要混凝土没有达到剥落状态，仍然可以使用此方法来检测混凝土的强度。
C.
对于每个测区的所有测点，平均值作为该测区的计算强度。
D.
当回弹仪为非水平方向且测试面为混凝土的非浇筑侧面时，对回弹值进行角度修正，并应对修正后的回弹值进行浇筑面修正。
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