题目

有如下VB程序段: Dim a(1 To 5)As Integer Dim res As string n = 19: i = 0 Do While n < 0   i = i + 1   a(i) = n Mod 2   n = n\2 Loop 程序运行后,数组元素a(1)~a(5)的值依次是(  ) A . 1,0,0,1,1 B . 1,1,0,0,1 C . 1,0,0,1,0 D . 1,0,1,0,0 答案:B
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