请回答下列问题:
Private Sub Command1_Click()
Dim s As String, ch As String
Dim i As Integer, k As Integer
Dim L As Integer, R As Integer
Dim temp As Integer, min As Integer
s = Text1.Text
i = 1: k = 0: temp = 0: min = 100
Do While i <= Len(s)
ch = Mid(s, i, 1)
If ch >= "0" And ch <= "9" Then
temp =
Else
k = k + 1
If Then
L = temp
Else
R = temp
If R - L + 1 < min Then min = R - L + 1
End If
temp = 0
End If
i = i + 1
Loop
Label2.Caption = "最短区间长度是" + Str(min)
End Sub
“觅求真知”图层第30帧到第50帧实现了“觅求真知”文字逐渐消失的动画效果,
则第50帧实例的Alpha值为,若第50帧实例的宽和高分别为(54,20),x和y分别为(70,390),实现的动画效果是(单选,填字母:A .向右下方移动并变小 / B .向左下方移动并变小 / C .向左下方移动并变大)