单项选择题
小筛分试验用的试验筛应符合GB/T6003.1-1997和GB/T6005-1997的规定,筛孔孔径分别为()。
A.0.500mm;0.250mm;0.125mm;0.075mm;0.045mm
B.0.500mm;0.200mm;0.120mm;0.075mm;0.045mm
C.0.500mm;0.250mm;0.120mm;0.075mm;0.045mm
D.0.500mm;0.250mm;0.125mm;0.075mm;0.040mm
点击查看答案&解析
