以下不具有Picture属性的对象是

A．投影、选择、连接是从二维表行的方向进行的运算
B．并、交、差是从二维表的列的方向来进行运算
C．投影、选择、连接是从二维表列的方向进行的运算
D．以上3种说法都不对

A．Type Student Num As Long Name As String End Type
B．Type Student Num As Integer Name As String * 10 End Type
C．Private Type Num As Long Score As Single End Type
D．Private Type Student Name As String Score(10)As String * 10 End Type