(多选题)15: 以下关于变量的类型说明符的使用中,正确的是()
A: Dim b As Single 等价于:Dim b!
B: Dim c As Double 等价于:Dim c#
C: Dim d As String 等价于:Dim d$
D: Dim e As Currency 等价于:Dim e@
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