单项选择题
A.0.01% B.0.02% C.0.03% D.0.04% E.0.05%
A.5.0%~10.0% B.7.0%~13.0% C.18.0%~20.0% D.22.0%~25.0% E.25.0%~30.0%
A.稻米 B.麦麸 C.灶心土 D.河砂 E.蛤粉