單項(xiàng)選擇題
A.2hB.12hC.24hD.48h
A.8-10mmB.10-12mmC.8-12mmD.9-11mm
A.4.75mmB.2.36mmC.1.18mmD.0.60mm
A.0.60mm,1.18mmB.0.075mm,1.18mmC.0.60mm,2.36mmD.0.075mm,2.36mm
A.0.01,0.1,0.1,0.1,0.1B.0.1,0.01,0.1,0.1,0.1C.0.1,0.1,0.01,1,0.1D.0.1,0.1,0.01,0.1,0.1
A.16%-39%B.16%-40%C.41%-70%D.71%-85%
A.9.50mmB.4.75mmC.2.36mmD.1.18mm
A.105±5℃B.110±5℃C.110±10℃D.105±10℃
A.3.0-2.3B.2.5-3.1C.3.1-3.7D.2.6-3.2
A.天然砂、人工砂B.山砂、海砂C.河沙、湖砂D.黃膠砂、黑湖砂
A.4.0kgB.5.0kgC.4.4kgD.5.4kg