(来学网)鼻导管吸氧,当氧流量为4L/min时,吸氧浓度(FiO2)是
  • A.
    (来学网)28%
  • B.
    (来学网)32%
  • C.
    (来学网)36%
  • D.
    (来学网)40%
  • E.
    (来学网)44%