用一个胶头滴管在切开的马铃薯上滴加碘液，结果马铃薯变成蓝色。这说明马铃薯含有哪种营养物质[ ]
A．淀粉
B．蛋白质
C．脂肪
D．维生素
答案：A
( )的买卖价格以基金份额净值为基础，不受市场供求关系的影响。
A．公司型基金B．契约型基金C．开放式基金D．封闭式基金
As an English major student , I think business English is more practical than other fields.
A．a English student / field
B．a English major student / regions
C．an English major / courses
D．an English student major /sciences
