We have some food _____. [ ]
A. eat
B. eating
C. to eat
D. eats
答案：C
用弱剂量共鸣火花疗法治疗时，电极与治疗部位的距离为（）
A.1～2mm
B.4～6mm
C.1～4mm
D.2～5mm
E.紧贴治疗部位
尽头线上道岔如何编号？
