For i = 1 To 10
If a(i) >= 0 Then
n=n+1
List1.AddItem Str(a(i))
Else
m=m+1
List2.AddItem Str(a(i))
Next
则该程序段出错的原因是缺少了( )
2008年奥运会五环旗高高飘扬在( )市