A.5s B.15s C.30s D.60s
A.低于50% B.低于90% C.50%±5% D.不低于50%
A.最小刻度0.1ml,精度1% B.最小刻度0.5ml,精度1% C.最小刻度0.1ml,精度2% D.最小刻度0.5ml,精度2%