m=a(1): s=""
For i=2 To 5
If a(i)>m Then m=a(i)
If a(i)<m Then
s=s+m
Else
s=m+s
End If
Next i
数组元素a(1)到a(5)的值依次为"F","Q","A","TV","WD",执行该程序段后,变量s的值为( )
For i=1 To 20
f(i)=0
Next i
i=1: j=20: n=0
m=1
Do While i<=j And f(m)=0
m=(i+j)\2
n=n+1
If a(m)=Key Then
f(m)=1
ElseIf a(m)<Key Then j=m-1
Else i=m+1
End If
Loop
数组元素a(1)到a(20)各不相同且按降序排列,若执行该程序段后n的值为4,则Key的值不可能为( )
i=2
Do While i<=10
For j= ①
If a(j+1)<a(j) Then
t=a(j+1): a(j+1)=a(j): a(j)=t
End If
Nextj
i=i+1
Loop
则代码中①处的语句可为( )