H2S是无色有()味的气体,
H2S是无色有()味的气体,
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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ABCB.abc和abeC.ABC和abcD.ABC和ABC
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 integerPrivate Sub Command1_Click( )x=5Call s1Call s2MsgBox xEnd SubPrivate Sub s1( )x=x+10End SubPrivate Sub s2( )Dim x as integerx=x+10End Sub窗体打开运行后,单击命令按钮,则消息框的输出结果是______
阅读如下程序, a = 1: b = 2: plus S, a, b: Print S:不能使其输出结果为3的plus过程为( )。 A、Sub plus(sum, a , b ): sum = a + b: End SubB、Sub plus(ByVal sum , a , b ): sum = a + b: End SubC、Sub plus(sum , ByVal a, ByVal b ): sum = a + b: End SubD、Sub plus(sum , ByRef a , ByRef b ): sum = a + b: End Sub
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.10B.30C.40D.50
假定一个工程由一个窗体文件Form1和两个标准模块文件Model1及Model2 组成。 Model1代码如下: Public X As Integer Public Y As Integer Sub S1( ) x=1 S2 End Sub Sub S2( ) y=10 Form1.Show End Sub Model2的代码如下: Sub Main( ) S1 End Sub 其中Sub Main被设置为启动过程。程序运行后,各模块的执行顺序是( )。A.Form1→Model1→Model2B.Model1→Model2→Form1C.Model2→Model1→Form1D.Model2→Form1→Model1
以下程序的输出结果是( )。 include main()fint x=0; sub(x,16,2); printf("%d\n", 以下程序的输出结果是( )。include<stdio.h>main()fint x=0;sub(x,16,2);printf("%d\n",x);}sub(int*a,int n,int k){if(k<=n) sub(a,n/2,2*k);*a+=k;}
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 slCall s2MsgBox x End Sub Private Sub sl( )x=x+20 End Sub Private Sub s2( )Dim x As Integer x=x+20End 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.10B.30C.40D.50
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.rehcaetB.tahreeeC.themeeD.eerthea
写出程序运行的结果Public class BasePublic virtual string Hello() {return “Base”;}Public class Sub:BasePublic 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;
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 SubA.10B.30C.40D.50
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 sl() 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.10B.30C.40D.50
有如下程序: Private Sub Command1 Click() Dim a As Single Dim b As Single a=5:b=4 Call S(a,B)End Sub Sub S(x As Single,y As Single) t=x x=t\y y=t Mod y End Sub 在调用运行上述程序后,a和b的值分别为A.0 0B.1 1C.2 2D.1 2
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,在属性窗口中把窗体的KeyPreview属性设置为True,然后编写如下程序: Diln S1 As String,S2 As String Private Sub Form. Load( ) Text1.Text="" Text2.Text="" Text1.Enabled=False Text2.Enabled=False End Sub Private Sub Form. KeyDown(KeyCode As Integer,Shift As Integer) S2=S2&Chr(KeyCode) End Sub Pri vate Sub Form. KeyPress(KeyAscii As Integer) S1=S1&Chr(KeyAscii) End Sub Private Sub Command1 Click( ) Text1.Text=S1 Text2.Text=S2 S1="" S2="" End Sub 程序运行后,先后按“a”、“b”、“c”键,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ABCB.空白C.ABC和abcD.出错
有以下程序includesub1(char a,char B) {char c;c=a;a=b;b=c;}sub2(char *a,char B) { 有以下程序 #include<stdio.h> sub1(char a,char B) {char c;c=a;a=b;b=c;} sub2(char *a,char B) {char c;c=*a;*a=b;b=c;} sub3(char *a,char *B) {char c;c=*a;*a=*b;*b=c;} main() { cha,a,b; a='A';b='B';sub3(a,b) putchar(a);putchar(b); a='A';b='B';sub2(a,b) ;putchar(a);putchar(b); a='A';b='B';sub1(a,b) ;putchar(a);putchar(b); } 程序运行后的输出结果是( )A.BABBABB.ABBBBAC.BABABAD.BAABBA
下列程序的执行结果为 Private Sub Commandl_Click() Dim s1 As String ,s2 As String s1= "abcd" Call Transfer(sl,s2) Print s2 End Sub Private Sub Transfer (ByVal xstr As String,ystr As String) Dim tempstr As String ystr=tempstr End SubA.dcbaB.abdcC.abcdD.dabc
单选题变直径圆管流,细断面直径d1,粗断面直径d2=2d1,粗细断面雷诺数的关系是( )。ApResub1/sub=0.5Resub2/sub/pBpResub1/sub=Resub2/sub/pCpResub1/sub=1.5Resub2/sub/pDpResub1/sub=2Resub2/sub /p
单选题干熄焦循环气体的主要成分为N2,其他成分还有H2、CH4、CO等气体,其中属于不可燃组分是( )。ApNsub2/sub /pBpHsub2/sub/pCpCHsub4/sub/pDCO
单选题煤矿井下的有害气体主要是由()、CO2、H2S、NO2、H2、NH3气体组成。ACOBpCHsub4/sub、SOsub2/sub/pCpSOsub2/sub、CO/pDpCO、CHsub4/sub、SOsub2/sub/p
单选题酶促反应速度(v)达到最大反应速度(Vmax)的80%时,底物浓度[S]为Ap1Ksubm/sub/pBp2Ksubm/sub/pCp3Ksubm/sub/pDp4Ksubm/sub/pEp5Ksubm/sub/p
单选题A pIsub2/sub=Isub3/sub/pB pIsub2/sub=4Isub3/sub/pC pIsub2/sub=2Isub3/sub/pD pIsub3/sub=4Isub2/sub/p
填空题设字符串S1= “ABCDEF”,S2= “PQRS”,则运算S=CONCAT(SUB(S1,2,LEN(S2)),SUB(S1,LEN(S2),2))后的串值为()。