题目

有如下 VB 程序段： For i = 1 To 8     a(i) = Int(Rnd * 7) + 1 Next i For i = 1 To 3     For j = 1 To 8 - 2 * i         If a(j) Mod 7 > a(j + 2) Mod 7 Then             t = a(j): a(j) = a(j + 2): a(j + 2) = t         End If      Next j Next i For i = 1 To 8     ch(i) = Chr(a(i) + Asc("A") - 1) Next i 执行该程序段后，ch(1)～ch(8)各元素值不可能的是（   ） A . AACBFBFE B . GGABCDDE C . ABBBCDDE D . ABBCDDEG 答案：D

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