1. (2020高二上·嘉兴期末) 有如下VB：程序段：

Dim i As Integer, C As Integer

Dim s As String, min As String, ch As String

s = Text1. Text

min ="z"：c=0

For i=1 To Len(s)   

    ch = Mid(s, i, 1)

    If ch>=“a”And ch<=“z”And ch<min Then

       min=chc=1

    ElseIf ch = min Then

        c=c+1

    End If

Next i

Label1.Caption = Str (c)

在文本框Text1中输入“Twinkle， twinkle， little star．”，程序执行后，标签Label1中显示的内容是(    )