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题型:单选题 题类:常考题 难易度:困难

浙江省台州市联谊五校2018-2019学年高二下学期信息技术期中考试试卷

【加试题】有如下 VB 程序段:

Private Sub Command1_Click()

Dim s As String, a As String, t As String

s = Text1.Text: t = ""

For i = 1 To Len(s)

    a = Mid(s, i, 1)

    If a >= "0" And a <= "9" Then

        t = t + a

    ElseIf a = "!" Then

        t = ""

    ElseIf t <> "" Then

        List1.AddItem t

    End If

Next i

End Sub

执行程序时,在文本框 Text1 中输入“12+34=46!789ok”(不包括双引号),单击按钮Command1后,在列表框List1中显示的结果是(  )

A、 B、 C、 D、
举一反三
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