园艺产品分级的意义（）。
参考答案：使园艺产品商品化
She said she had got ________ of looking at nature through dirty curtains and dusty windows.[ ]
A．interested
B．tired
C．grateful
D．concerned
账户按经济内容分类，属于成本类账户的是( )。
A．生产成本
B．未分配利润
C．盈余公积
D．所得税
