网友您好, 请在下方输入框内输入要搜索的题目:
题目内容
(请给出正确答案)
下列分子式分别代表什么物质。H2S
参考答案
更多 “下列分子式分别代表什么物质。H2S” 相关考题
考题
在窗体上画一个命令按钮和两上文体,其名称分别为 Command1 、 Text1 和 Text2 ,然后编写如下程序:Dim S1 As String, S2 As StringPrivate Sub Form_Load()Text1. Text=””Text2. Text=””End SubPrivate Sub Text1_KeyDown(KeyCode As Integer, Shift As Integer)S2=s2 Chr(KeyCode)End SubPrivate Sub Text1_KeyPress(KeyAscii As Integer)S1=S1 chr(KeyAscii)End SubPrivate Sub Command1_Click()Text1.Text=S2Text2.Text=S1S1=""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 abcC.ABC 和 abcD.ABC 和 ABC
考题
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ABCB.abc和abeC.ABC和abcD.ABC和ABC
考题
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,在属性窗V1中把窗体的KeyPreview属性设置为True,然后编写如下程序:Dim S1 As String,S2 As StringPrivate Sub Form_Load()Text1.Text=””Text2.Text=””TeXt1.Enabled=FalseText2.Enabled=FalseEnd SubPrivate Sub Form_KeyDown(KeyCode As Integer,Shift As Integer)S2=S2Chr(KeyCode)End SubPrivtee Sub Form_KeyPress(KeyAscii As Integer)S1=S1Chr(KeyAscii)End SubPfivtee Sub Command 1_Click()Text1.Text=S1Text2.Text=S2S1=””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
考题
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
考题
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.10B.30C.40D.50
考题
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
考题
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.rehcaetB.tahreeeC.themeeD.eerthea
考题
下列程序的运行结果是()。includevoid sub(int*s,int*y){static int m=4:*y=s[m];m--;}
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,
考题
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;
考题
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
考题
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 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
考题
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
考题
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,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
考题
运行下列程序:Private Sub form_Click( )x = 8: y = 2Call fun1((x), y)Print x, yEnd SubPrivate Sub fun1(x, y)s = xx = s / yy = s Mod yEnd Sub单击窗体后,则在窗体上显示的结果是( )。A.4 2B.8 2C.8 0D.2 4
考题
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
考题
下列程序运行后的输出结果是______。Private Sub f(k,s)s=1For j=1 To ks=s*jNextEnd SubPrivate Sub Command1_Click()Sum=0For i=1 To 3Call f(i,s)Sum=Sum+sNextPrint SumEnd Sub
考题
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。A
COB
pCHsub4/sub、SOsub2/sub/pC
pSOsub2/sub、CO/pD
pCO、CHsub4/sub、SOsub2/sub/p
考题
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A
p1Ksubm/sub/pB
p2Ksubm/sub/pC
p3Ksubm/sub/pD
p4Ksubm/sub/pE
p5Ksubm/sub/p
考题
单选题饱和蒸气分别在形状、尺寸、温度都相同的A、B两个等温垂直壁面上凝结,其中A上面是珠状凝结,B板上是膜状凝结。若两个壁面上的凝结传热量分别为QA和QB则( )。A
pQsubA/sub =QsubB/sub/pB
pQsubA/subQsubB/sub/pC
pQsubA/subQsubB/sub/pD
pQsubA/sub =QsubB/sub/2/p
考题
单选题A
pIsub2/sub=Isub3/sub/pB
pIsub2/sub=4Isub3/sub/pC
pIsub2/sub=2Isub3/sub/pD
pIsub3/sub=4Isub2/sub/p
考题
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()。
热门标签
最新试卷