H2S是一种恶臭性很大的气体,空气中H2S含量大于()环境里就会中毒。
第1题:
在窗体中添加一个命令按钮(名为Command1),然后编写如下代码:
Public x as integer
Private Sub Command1_Click( )
x=5
Call s1
Call s2
MsgBox x
End Sub
Private Sub s1( )
x=x+10
End Sub
Private Sub s2( )
Dim x as integer
x=x+10
End Sub
窗体打开运行后,单击命令按钮,则消息框的输出结果是______
第2题:
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
第3题:
现有以下程序代码: Private sub Form_click( ) Static s as integer s=s+1 text4, text = str(s) End sub 单击窗体4次后,文本框中的内容是( )。
A.4
B.0
C.2
D.以上都不对
第4题:
下列程序的运行结果是( )。 #include<stdio.h> void sub(int*s,int*y) {static int m=4: *y=s[m]; m--; } void main() {int a[]={1,2,3,4,5},k,x; printf("\n"); for(k=0;k<=4;k++) {sub(a,&x); printf("%d,",x); } }
A.5,4,3,2,1,
B.1,2,3,4,5,
C.0,0,0,0,0,
D.4,4,4,4,4,
第5题:
下列程序的运行结果是( )。 #include<stdio.h> void sub(int*s,int*y) {static int m=4; *y=s[0]; m++; } void main() {int a[]={1,2,3,4,5},k; int x; printf("\n"); for(k=0;k<=4;k++) {sub(a,&x); printf("%d,",x); } }
A.1,1,1,1,1,
B.1,2,3,4,5,
C.0,0,0,0,0,
D.4,4,4,4,4,
第6题:
A、黄色、剧毒、比空气重
B、无色、剧毒、比空气重
C、无色、剧毒、比空气轻
D、无色、无毒、比空气轻
第7题:
设字符串s1='ABCDEFG',s2='PQRST',则运算s=CONCAT(SUB(s1,2,LEN(s2)),SUB(s1,LEN(s2,2))后的串值为(65)。
A.'ABCDEFEF'
B.'BCDEFG'
C.'BCPQRST'
D.'BCQR'
第8题:
在窗体上画一个命令按钮和两个文本框,其名称分别为Command1、Text1和Text2,然后编写如下程序: Dim S1 As String,S2 As String Private Sub Form_Load() Text1.Text="" Text2.Text="" End Sub Private Sub Text1_KeyDown(KeyCode As Integer,Shift As Integer) S2=S2 & Chr(Keycode) End Sub Private Sub Text1_KeyPress(KeyAscii As Integer) S1=S1 & Chr(KeyAscii) End Sub Private Sub Command1_Click() Text1.Text=S2 Text2.Text=S1 S1="" S2="" End Sub 程序运行后,在Text1中输入“abc”,然后单击命令按钮,在文本框Text1和Text2中显示的内容分别为______。
A.abc和ABC
B.abc和abe
C.ABC和abc
D.ABC和ABC
第9题:
编写如下事件过程: Private sub sub1 (ByVal x1 As String, y1 As String) Dim xt As String Dim i As Integer i = Len(x1) Do While i>= 1 xt = xt + Mid(x1, i, 1) i=i-1 Loop y1 = xt End Sub Private Sub Form. Click() Dim s1 As String, s2 As String s1= "teacher" sub1 s1, s2 Print s2 End Sub 程序运行后,单击窗体,则窗体上显示的内容是
A.rehcaet
B.tahreee
C.themee
D.eerthea
第10题:
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;