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【单选题】
确定混凝土强度等级的是下列哪项?( )
A.
立方体抗压强度标准值
B.
立方体抗压强度设计值
C.
轴心抗压强度标准值
D.
立方体抗压强度平均值
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B.
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【单选题】If a gues doesn't realize that he/she is at the wrong hotel until he/she is checked in, the receptionist should______________.
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