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D.JG/T245—2011 246、在实验室拌制混凝土试块用人工插捣成型,插捣上层时捣棒应贯穿上层后插入下层(B)㎜。 A.10-15 B.20-30 C.10-20 D.25-35 247、砂浆试块制备时,拌合物应(A)次注满试模。 A.1 B.2 C.3 D.4 248、水泥强度测定方法主要有两种用途,即合格检验和(B)。A.计量检验 ...