(来学网)指示剂的变色范围pH=
  • A.
    (来学网)PK±10
  • B.
    (来学网)>PKIn±5
  • C.
    (来学网)>PKIn±1
  • D.
    (来学网)>PKIn+0.5
  • E.
    (来学网)>PKIn±0.1