(来学网)胎儿颈部见"U"形或"W"形压迹,彩色见环状血流,多为
  • A.
    (来学网)脐带绕颈
  • B.
    (来学网)胎儿畸形
  • C.
    (来学网)蹼颈
  • D.
    (来学网)单脐动脉
  • E.
    (来学网)颈部水囊瘤