(来学网)睾丸下降不良在新生儿男婴中约占
  • A.
    (来学网)50%
  • B.
    (来学网)33%
  • C.
    (来学网)10%
  • D.
    (来学网)3%
  • E.
    (来学网)不到1%
正确答案:
C