提示小儿缺乏维生素B₁₂的血清维生素B<s

在窗体中添加一个名称为Command1的命令按钮，然后编写如下程序： Public x As Integer Private Sub Command1_Click() x=10 Call s1 Call s2 MSgBox x End Sub Private Sub s1() x=x＋20 End Sub Private Sub s2() Dim x As Integer x=X＋20 End Sub 窗体打开运行后，单击命令按钮，则消息框的输出结果为______。

A．10

B．30

C．40

D．50

写出程序运行的结果

Public class Base

Public virtual string Hello() {return “Base”;}

Public class Sub:Base

Public override string Hello() {return “Sub”;}

1. Base b = new Base(); b.Hello;

2. Sub s = new Sub(); s.Hello;

3. Base b = new Sub (); b.Hello;

4. Sub s = new Base(); s.Hello;

有如下SUB过程:

Sub s(x As Single,y As Single)

t=x

x=t / y

y=t Mod y

End Sub

在窗体上添加一个命令按钮,然后编写如下事件过程:

Private Sub Form_Click()

Dim a As Single

Dim b As Single

a=5

b=4

s a,b

Print a,b

End Sub

则程序运行后,单击命令按钮,输出的结果为【 】 。

编写如下事件过程： Option Base 1 Private Sub Form Click() Dim x1()As Integer Dim i As Integer Dim s As Integer ReDim x1(3) For i = 1 To UBound(x1) x1(i)=i + 1 Next i Call sub1(x1) For i = 1 To UBound(x1) s = s + x1(i) Next i Print s End Sub Private Sub sub1(n()As Integer) Dim i As Integer ReDim Preserve n(5) For i = 3 To 5 n(i)=n(i-1)*2 Next i End Sub 程序运行后，单击窗体，则窗体上显示的内容是

A．6

B．12

C．24

D．47

PaO<SUB>2</SUB>↓，PaCO<SUB>2</SUB>↑提示（ ）

营养不良小儿常并发各种维生素缺乏，其中最常见缺乏是

A．维生素A

B．维生素B

C．维生素B12

D．维生素C

E．维生素D

下面程序的输出结果是。 Private Sub Commandl_Click ch$=“ABCDEF” proc ch：Print ch End Sub Private Sub proc(ch As Stnng) s=“” For k=Len(ch) TO 1 Step -1 s=s&Mid(ch，k，1) Next k ch=s End Sub A．ABCDEF B．FEDCBA C．A D．F

A、Sub plus(sum, a , b ): sum = a + b: End Sub

B、Sub plus(ByVal sum , a , b ): sum = a + b: End Sub

C、Sub plus(sum , ByVal a, ByVal b ): sum = a + b: End Sub

D、Sub plus(sum , ByRef a , ByRef b ): sum = a + b: End Sub

在窗体中添加一个名称为Commandl的命令按钮，然后编写如下程序： Public x As Integer Private Sub Commandl_click() x＝10 Call s 1 Call s 2 MsgBOx x End Sub Pfivate Sub s1() x＝x+20 End Sub Private Sub

A．10

B．30

C．40

D．50