下列符号常量的声明中,( )是不合法的。 Const a =“OK” Const a As Single=1.1 Const a As Integer=“12” Const a As Double=Sin(1) A.; B.; C.; D.; 下列符号常量的声明中,( )是不合法的。 Const a =“OK” Const a As Single=1.1 Const a As Integer=“12” Const a As Double=Sin(1) A.; B.; C.; D.; 正确答案:C