A:乙烯
B:空气
C:氦气
D:CO2
将100g 10%的某固体物质M的溶液,分别进行下述操作,所得溶液中溶质的质量分数最小的是( )
Miss Lee, I didn't catch what you said. Could you tell me ___________ again?
— No problem. Here you are.