you will pay for them?把家里的烟雾报警器换成烟雾,一氧化碳二合一报警器,就行了
我不买新的,OKAY!?买新房。现在这是code了。
飞老,谨防cfc右派给你介绍一个CO发生器。![]()

co和air基本上没密度区别,所以从消防常识上看当作一样重,这个我问过消防队,确认正确。CO is lighter. Well, slightly.
Carbon monoxide (CO) is a colorless, odorless, and tasteless gas that is slightly less dense than air.
Firefighters 都中缀生![]()
