(来学网)定影液的pH值一般控制在
  • A.
    (来学网)2.0~3.0
  • B.
    (来学网)4.0~6.0
  • C.
    (来学网)6.5~7.0
  • D.
    (来学网)7.5~8.0
  • E.
    (来学网)8.5~9.0