(来学网)当通气储备百分比为多少时出现气急
  • A.
    (来学网)95%
  • B.
    (来学网)90%
  • C.
    (来学网)85%
  • D.
    (来学网)75%
  • E.
    (来学网)65%
正确答案:
E