(来学网)直流电治疗中电极的各边在衬垫各边之内约
  • A.
    (来学网)0.5CM
  • B.
    (来学网)1CM
  • C.
    (来学网)1.5CM
  • D.
    (来学网)2CM
  • E.
    (来学网)2.5CM