(来学网)肺炎患儿进行面罩给氧时,吸氧浓度最好为
  • A.
    (来学网)lO%~20%
  • B.
    (来学网)20%~30%
  • C.
    (来学网)30%~40%
  • D.
    (来学网)lO%~50%
  • E.
    (来学网)50%~60%
正确答案:
E