我国《中小学教室换气卫生标准》规定教室内空气中CO[img=~/QImg/2013-10-14-11-41-40/image001.jpg]最高允许浓度为
A、0.05%(500ppm)
B、0.10%(1000ppm)
C、0.15%(1500ppm)
D、0.20%(2000ppm)
E、0.25%(2500ppm)
发布时间:2023-07-24 21:07:26
A、0.05%(500ppm)
B、0.10%(1000ppm)
C、0.15%(1500ppm)
D、0.20%(2000ppm)
E、0.25%(2500ppm)