A:氧炔焰:切割、焊接金属
B:用SO2漂白食品
C:液氮:冷冻物质
D:稀有气体:填充霓虹灯
读一读,给下列句子排序,在括号里写阿拉伯数字即可。
____It's green.
____I like Nancy's home.
____Why?
____What colour is it?
____Do you like Nancy's home or Danny's home?
____Because' the dining room is so big. I like the colour too.