(来学网)妊娠22周时,胎儿肾盂宽度的正常测值应在
  • A.
    (来学网)<4mm
  • B.
    (来学网)<5mm
  • C.
    (来学网)<6mm
  • D.
    (来学网)<7mm
  • E.
    (来学网)<3mm