(来学网)皮肤表面的pH值为:
  • A.
    (来学网)3.0~4.0
  • B.
    (来学网)3.5~4.0
  • C.
    (来学网)5.5~7.0
  • D.
    (来学网)7.0~8.0
  • E.
    (来学网)4.5~5.5