(来学网)采用ACD储存全血在4℃保存21天时,红细胞活性仍有
  • A.
    (来学网)50%
  • B.
    (来学网)60%
  • C.
    (来学网)70%
  • D.
    (来学网)80%
  • E.
    (来学网)90%
正确答案:
C