单项选择题
A.0.17mLB.0.24mLC.0.34mLD.0.48mL
A.0.0005ΩB.0.0007ΩC.0.0014ΩD.0.0028Ω
A.0.01mg/LB.0.03mg/LC.0.04mg/LD.0.09mg/L