题干

糖类、脂肪、蛋白质、核酸共有的元素是(    )

A:C,H,O,N,P

B:C,H,O,N

C:C,H,O

D:O,H

上一题 下一题 0.0难度 选择题 更新时间:2019-11-14 12:50:33

答案(点此获取答案解析)

C

同类题2

完形填空

    It impressed me a lot, I never thought that little help will turn out to be the most satisfying thing I have ever done.

    One day I met a man on my way home. He was tired, and1 to climb further. With a broad2 he asked if I could help him with some money. He was paralyzed (瘫痪) in both legs and was 3 funds for some operation. He said that if operated successfully, he could 4a training guaranteeing him a job. I was full of 5 and even asked him to show his legs. I gave him the6 money. After a few days, he again came at my doorstep asking for more money for accommodation. This time I was more or less 7 he is not cheating me. I gave him some and said this is all I have.

    A year went by and I had moved to a(n)8 place. One fine day I got a call from an unknown number. Caller called out his name but I didn't 9 him. Then he said he is the very paralyzed person I helped a year ago.

    I asked him, “How are you doing now.” He said, “Sir, you recognize me not by my name but by my10state.” “With your kind help I am now able to 11 on my legs without support. I was operated 12I am married to a beautiful lady. Besides I have a good job and stable 13.

    I don't 14 remember if I gave him my phone number15 what he said next was touching. He said he wanted to return my money so that I didn't feel cheated and continue to help people 16 in the future. I don't know whether he read my facial expression the day I helped him but tears were 17 down my face. That day I18 him that I will continue to help people as I see a(n)19—small or big. It is the small event that makes a big 20 to my life.

同类题4

某商场元月举行VIP客户积分换购活动,VIP客户根据卡内积分多少可换取不同额度的代金券。假设VIP客户共有n名,VIP卡内积分存放在数据库“customer.accdb”的Integral表中,换购活动的VB程序代码如下,程序运行时界面如第7题图所示。工作人员在文本框Text1中输入VIP卡号后,单击“换购”按钮Command1,在文本框Text2中输出VIP客户的积分数,在标签Label3中显示可以换购的代金券额度,积分清零。按此要求编写程序如下, 但加框处代码有错,请改正。

Dim ID( ) As String    '用于存放客户卡号

Dim total( ) As Long      '用于存放积分数

Dim sc As Long                  'VIP客户人数

Dim jf As Long                  '积分数

Private Sub Command1_Click( )

  Dim k As String                '客户卡号

  Dim q As Long               '代金券额度

  Dim i As Long

  k = Text1.Text

  For i = 1 To sc     ’顺序查找

      If ID(i) = k Then

          jf = total(i)     

          cash(jf) = q               ’ ①

          Exit For

      End If

      Text2.Text = Str(jf)

      Label3.Caption = “您可换购的代金券总额为:”+ Str(q) + “元”

    Next i

  End If

End Sub

' cash函数用于计算VIP客户可换购的代金券额度

Function cash(jf As Long) As Long

  If jf >= 2000 And jf <= 20000 Then

       Cash = jf\2000*10

ElseIf jf > 20000 And jf <= 50000 Then

       Cash = jf\2000*11

ElseIf jf > 50000 And jf <= 100000 Then

       Cash = jf\2000*12

ElseIf jf > 100000 And jf <= 150000 Then

       Cash = jf\2000*13

 Else jf > 150000 Then         ’ ②

       Cash = jf\2000*14

End If

End Function

Private Sub Form_Load()

   Dim conn As New ADODB.Connection, rs As New ADODB.Recordset

   Dim intSQL As Long

   conn.ConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + App.Path + "\ customer.accdb"

    conn.Open

   intSQL = "SELECT score  FROM Integral" 

     Set rs.ActiveConnection = conn

     rs.CursorType = adOpenStatic

     rs.Open intSQL

     sc = 0

     Do While Not rs.EOF

       sc = sc + 1

       total(sc) = rs.Fields("score")

       rs.MoveNext

     Loop

rs.Close

     conn.Close

     Set rs = Nothing

     Set conn = Nothing

End Sub