A:运动状态
B:组成和结构
C:性质和用途
D:制取和应用
——Which share is for me ?——Your can take _____ half. They are exactly the same.
下图是甲、乙两种固体物质的溶解度曲线。下列说法正确的是( )
12×14+34×12 =( )