單項選擇題依據(jù)GB/T14684-2011標準要求,顆粒級配分計篩余精確至()%,單次累計篩余精確至()%,單次砂細度模數(shù)精確至(),兩次累計篩余精確至()%,兩次結(jié)果算術(shù)平均值精確至()。

A.0.01,0.1,0.1,0.1,0.1
B.0.1,0.01,0.1,0.1,0.1
C.0.1,0.1,0.01,1,0.1
D.0.1,0.1,0.01,0.1,0.1


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1.單項選擇題依據(jù)GB/T14684-2011標準要求,2區(qū)砂0.6mm累計篩余在()

A.16%-39%
B.16%-40%
C.41%-70%
D.71%-85%

5.單項選擇題依據(jù)GB/T14684-2011標準要求,砂按產(chǎn)源分為()兩類。

A.天然砂、人工砂
B.山砂、海砂
C.河沙、湖砂
D.黃膠砂、黑湖砂