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对轻骨料砼，插入式振动器采用行列式布置时，插点间距不大于（）

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对轻骨料砼，插入式振动器采用行列式布置时，插点间距不大于（）

A.1.0R

B.1.5R

C.1.2R

D.2.0R

参考答案:

答案：A

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