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【单选题】
对有密实度要求的填方，在夯实或压实之后，要对每层回填土的质量进行检验。一般采用环刀取样测定土的();或用小轻便触探仪直接通过锤击数来检验，符合要求后，填筑上层。A.
干密度和密实度
B.
堆积密度和密实度
C.
表观密度和密实度
D.
干密度和孔隙率
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