程序修改题，每小题①②③④处有1处错误，找出并改正

（1）下列程序的功能是在文本框Text1中显示变量a和b的较大值。 a = 1：b = 2 ① If a > b Then ②   c = a Else ③ c = b End If ④ Text1.Caption = Str(c) 错误在______处，改为_______________。

（2）下列程序的功能是标签Label1中显示1+2+3+…+10值。 Dim s As Integer Dim i As Integer ① s = 0 ② For i =" 1" To 10 ③   s = i Next i ④ Label1.Caption = Str(s) 错误在______处，改为_______________。

 

运行如下Visual Basic程序，单击命令按钮Command1，出现如图所示的出错信息。发生"下标越界"错误时所执行的语句是(  )
Private Sub Command1_Click()
Dim a(0 To 5) As Integer
Dim i As Integer ’①
a(0) = 1     '②
For i = 1 To 5
a(i) = 2 * a(i - 1) + 1 '③
Next i
Text1.Text = Str(a(6)) '④
End Sub

A．①

B．②

C．③

D．④

下列流程图描述的是判断任意3个正数A、B、C是否能构成勾股数，请按此算法功能，把流程图填写完整。

A．A^2="B^2+C^2" or B^2="A^2+C^2" and C^2=A^2+B^2

B．A^2="B^2+C^2" and B^2="A^2+C^2" or C^2=A^2+B^2

C．A^2="B^2+C^2" and B^2="A^2+C^2" and C^2=A^2+B^2

D．A^2="B^2+C^2" or B^2="A^2+C^2" or C^2=A^2+B^2

下面的程序代码是通过函数求出二个整数型变量a、b中的较大值，其中所定义的函数名是（   ）
Function max(a, b As Integer) As Integer
If a > b Then max = a  Else  max = b
End Function
Private Sub Command1_Click()
Dim a As Integer, b As Integer, s as integer
a =" Val(Text1.Text):" b = Val(Text2.Text)
s =" max(a," b)
Text3.Text = s
End Sub

A．Command1_Click

B．function

C．max

D．max(a, b As Integer)