![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
有一串数列,第一个数是7,从第二个数开始,后一个数比前一个数多4,最后一个数是91,这串数列共有多少个数()
A.20
B.21
C.22
D.23
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
C、22
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.20
B.21
C.22
D.23
C、22
A.10001
B.10000
C.10011
D.11000
Private Sub Form_Click()
Dim last_one As Long
Dim last_two As Long
Dim this_one As Long
Dim i As Integer
last_one = 1 '数列的第二个数
last_two = 2 '数列的第三个数
i = 4 '从数列的第四个数求起
Do
this_one = last_one + last_two
last_one = last_two
last_two = ------1-------
If i = 17 Then
Form1.Print "No:17="; this_one
End If
------2------
Loop While this_one <= 100000000#
Form1.Print "No:";------3------; "is > 1E+8"
End Sub
A.5,2
B.2,5
C.3,4
D.4,5