(来学网)超声测量头臀长度(CRL)计算孕周的简易公式是
  • A.
    (来学网)孕周=CRL(cm)
  • B.
    (来学网)孕周=CRL(cm)+3.5
  • C.
    (来学网)孕周=CRL(cm)+5
  • D.
    (来学网)孕周=CRL(cm)+6.5
  • E.
    (来学网)孕周=CRL(cm)+4.5