Private Sub Command1_Click()

    Dim As Single, b As Single, c As Single, p As Single, s As Single

    a≡Val(Text1. Text)

    b=Val(Text2. Text)

    c=Val(Text3. Text)

    p=(a+b+c)/2

    If a＜=p Or b＞=p Or c＞=p Then

        Label1. Caption="不能构成三角形"

    Else

        s=Sqr(p*(p-a)*(p-b)*(p-c))*p

        Label1. Caption="面积为"& s

    End If

End Sub

Dim c(1 To 26)As Integer

s=Text1.Text

For i=1 To Len(s)

    x=Mid(s, i, 1)

    If x>="a" Then

        t=Asc(x)-Asc("a")+1

    Else

        t=Asc(x)-Asc("A")+1

    End If

       ① 

    If c(t)>=Max Then Max=c(t):   ②  

Next i

Text 2.Text=Chr(f+Asc("A"))

划线处应该填入的正确语句是（   ）

For i=1 To 5

    a(i)=Int (Rnd*9) +1

Next i

For i= 1 To 5

    If i Mod2=0 Then

        a(i) = a(i)\i

    Else

        a(i)= a(i) Mod i

    End If

Next i

执行该程序段后，在下列选项中a(1)至a(5)各元素可能是（    ）

s = "A-b2c " ; ch = ""

list=[4 , 3 , 1 , 5 ,2]

for i in range(1en( s)):

    if "A " <= s [i] <= "Z " :

        ch = ch + chr (ord(s [i]) + list[i])

    elif "a " <= s [i] <= "z " :

        ch = ch + chr (ord(s [i]) - list[i])

    else:

        ch= s [i]+ch

print(ch)

该程序运行后，输出的结果是（   ）