我国《中小学教室换气卫生标准》规定教室内空气中CO(来学网)最高允许浓度为
  • A.
    (来学网)0.05%(500ppm)
  • B.
    (来学网)0.10%(1000ppm)
  • C.
    (来学网)0.15%(1500ppm)
  • D.
    (来学网)0.20%(2000ppm)
  • E.
    (来学网)0.25%(2500ppm)
正确答案:
C