单项选择题
A.0.5% B.0.3% C.0.2% D.0.1%
A.2.36mm筛孔为±1%,其余筛孔为±2% B.2.36mm筛孔为±2%,其余筛孔为±1% C.0.075mm筛孔为±1%,其余筛孔为±2% D.0.075mm筛孔为±2%,其余筛孔为±1%
A.4.8% B.4.9% C.5.0% D.5.1%