(来学网)孕33周以后,胎儿肾盂宽度正常值应小于
  • A.
    (来学网)4mm
  • B.
    (来学网)5mm
  • C.
    (来学网)6mm
  • D.
    (来学网)7mm
  • E.
    (来学网)8mm