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  • 1. (2021高三上·浙江月考) 有VB程序段如下:

    s = "United by Emotion": s1 = "”

    For i=1 To Len(s) Step 4

        c = Mid(s, i,1)

        If Asc(c) >= Asc("a") Then

            c = Chr(Asc(c) - Asc("a") + Asc("A"))

            s1=c+s1

        End If

    Next i

    程序运行后,s1的值是(     )

    A . "UEYON" B . "NOYE" C . "EYON" D . "UEEI"

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