单项选择题
A.0.01mm/脉冲 B.0.1mm/脉冲 C.10mm/脉冲 D.100mm/脉冲
A.106Ω B.107Ω C.108Ω D.109Ω
A.0.005mm/脉冲 B.0.02mm/脉冲 C.0.04mm/脉冲 D.0.08mm/脉冲