(来学网)检查视力时,视力低下的诊断标准是小于
  • A.
    (来学网)4.0
  • B.
    (来学网)4.5
  • C.
    (来学网)4.8
  • D.
    (来学网)5.0
  • E.
    (来学网)1.0