题目

有如下VB程序段： Dim a(1 To 10) As Integer, b(5 To 10) As Integer a(1) = 71: a(2) = 73: a(3) = 90: a(4) = 79: a(5) = 76 a(6) = 88: a(7) = 91: a(8) = 84: a(9) = 100: a(10) = 80 For i = 10 To 1 Step -1 b((a(i) - 1) \ 10) = b((a(i) - 1) \ 10) + 1 Next i 该程序段运行后，数组元素b(7)的值是（） A . 4 B . 5 C . 6 D . 7 答案：B

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