一氧气瓶的容积是<img src="https://nimg.ppkao.com/2019-04/wuacheng/2019042414343857543.jpg?sign=a7f563830cb15c5c64523ed921ed298b&t=62d5d4da" />其中氧气的压强是<img src="https://nimg.ppkao.com/2019-04/wuacheng/2019042414345344243.jpg?sign=085d0e01beff2ae88facfc4920159b00&t=62d5d4da" />规定瓶内氧气压强降到<img src="https://nimg.ppkao.com/2019-04/wuacheng/2019042414351319392.jpg?sign=ceaa9de9546e26155b4d11498f369655&t=62d5d4da" />时就得充气，以免混入其他气体而需洗瓶，今有一玻璃室，每天需用<img src="https://nimg.ppkao.com/2019-04/wuacheng/2019042414353380845.jpg?sign=099a51218f0eba7706f3420128d84766&t=62d5d4da" />问一瓶氧气能用几天？