单选题:下列关于碾压式土石坝防渗体与岸坡结合部位施工的说法错误的是(  )。

题目内容:
下列关于碾压式土石坝防渗体与岸坡结合部位施工的说法错误的是(  )。 A.填筑土料宜选用黏性土
B.填筑土料含水率应调整至施工含水率上限
C.应采用轻型机械压实
D.填筑分层厚度应较坝体大
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