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设P{X=x1}=0.6，P{X=x2}=0.4（x1
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更多 “设P{X=x1}=0.6，P{X=x2}=0.4（x12），且E（X）=1.4，D（X）=0.24，则x1=（），x2=（）。” 相关考题
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（ 11 ）在窗体中添加一个名称为 Command1 的命令按钮，然后编写如下事件代码：Private Sub Command1_Click( )Dim x As Integer, y As Integerx=12 : y=32Call p(x, y)MsgBox x*yEnd SubPublic Sub p (n As Integer, By Val m As Integer)n=n Mod 10m=m Mod 10End Sub窗体打开运行后，单击命令按钮，则消息框的输出结果为 ___________ 。
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（ 25 ）要求当鼠标在图片框 P1 中移动时，立即在图片框中显示鼠标的位置坐标。下面能正确实现上述功能的事件过程是A ）Private Sub P1_MouseMove （ Button AS Integer,Shift As Integer,X As Single,Y As Single ）Print X,YEnd SubB ）Private Sub P1_MouseDown （ Button AS Integer,Shift As Integer,X As Single,Y As Single ）Picture.Print X,YEnd SubC ）Private Sub P1_MouseMove （ Button AS Integer,Shift As Integer,X As Single,Y As Single ）P1.Print X,YE n d S u bD ）Private Sub Form_MouseMove （ Button AS Integer,Shift As Integer,X As Single,Y As Single ）P1.Print X,YEnd Sub
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（16）在窗体上画一个命令按钮，其名称为Commandl.程序运行后，单击命令按钮，输出结果是 Private Sub p1(n As Integer) For i=n To 1 Step -1 x=String(i,"*") Print x Next i End Sub Private Sub Commandl_Click() P1(3) End SubA.*** ** *B.* ** ***C.* * *D.******
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设X服从标准正态分布,且0a)=p(X≥a)=1－Ф(a)B.P(a≤X≤b)=Ф(b)－Ф(a
设X服从标准正态分布，且0＜a＜b，则下列各式成立的有( )。A．P(X＞a)=p(X≥a)=1-Ф(a)B．P(a≤X≤b)=Ф(b)-Ф(a)C．P(X=0)=0D．P(-a＜X＜a)=Ф(a)-1E．P(X=b)=1
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下面程序： Private Sub Form. _Click () Dim x, y, z As Integer x=5 y=7 z=0 Call P1(x, y, z) Print Str (z) End Sub Sub P1 (ByVal a As Integer, ByVal b As Integer , c As Integer) c= a+b End Sub 运行后的输出结果为______。A．0B．12C．Str(z)D．显示错误信息
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要求当鼠标在图片框P1中移动时，立即在图片框中显示鼠标的位置坐标。下面能正确实现上述功能的事件过程是A．Private Sub P1_MouseMove(Button As Integer，Shift As Integer，x As Single，Y As Single) Print X，Y End SubB．Private Sub P1_M0useDown(Button As Integer，Shift As Integer，X As Single，Y As Single) Picture．Print X，Y End SubC．Private Sub P1_MouscMove(Button As integer，Shift As Integer，X As Single，Y As Single) P1．Print X．Y End SubD．Private Sub Form_MouseMove(Button As Integer，Shift As Integer，x As Single，Y As Single) P1．Print X．Y End Sub
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单击命令按钮时，下列程序的执行结果为 Private Sub Command1_Click() Dim a As Integer，b As Integer，c As Integer a=2：b=3：C=4 Print P2(c，b，A)End Sub Private Function P1(x As Integer，y As Integer，z As Integer) P1=2 * X + y + 3 * z End Function Private Function P2(x As Integer，y As Integer，z As Integer) P2=P1(z，x，y) + X End FunctionA．21B．19C．17D．34
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以下能够正确计算n!的程序是A．Private Sub Command1 Click() n=5：x=1 Do x=x * I I=I + 1 Loop While I ＜ n Print x End SubB．Private Sub Command1_Click() n=5：X=1：I=1 Do X=X*I I=I + 1 Loop While I ＜n Print x End SubC．Private Sub Command1_Click() n=5：X=1：I=1 Do X=X * I I=I + 1 Loop While I＜=n Print X End SubD．Private Sub Command1_Click() n=5：X=1：I=1 Do x=x * I I=I + 1 Loop While I＞n Print X End Sub
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有如下函致： Function fact(x As Integer)As Long Dim p As Long，i As Integer p=1 For i=1 To x p=p*1 Next fact=p End Function 调用它的事件过程如下： Private Sub Command1_Click() i=Val(Inputbox("请输入数据")) a=fact((i)) Print a End Sub 若输入数据5，则运行结果为A．120B．60C．80D．100
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执行下面程序，第一行输出结果是【 】，第二行输出结果是47。Option ExplicitPrivate Sub Form_Click( )Dim A As IntegerA=2Call Sub1 (A) End SubPrivate Sub1 (x As Integer)x=x*2+1If x＜10 ThenCall Sub1 (x)End Ifx=x*2+1Print xEnd Sub
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设有如下程序：Prirate Sub Form_Click()Dim a As Integer,b AS Integera=20:b=50p1 a,bp2 a,bp3 a,bPrint"a="；a,"b=";bEnd SubSub p1(x As Integeh By Val y As Integer)x=x+10y=y+20End SubSub p2(ByVal x As Integer,y As Integer)x=x+10y=y+20End SubSub p3 (ByVal x As Integer,ByVal y As Integer)x=x+10y=y+20End Sub该程序运行后，单击窗体，则在窗体上显示的内容是：a= ______ 和b= _____。
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有如下自定义过程： Sub test(x As Integer) x =X *2+1 If x＜6 Then Call test(x) End If x=x* 2 + 1 Print x； End Sub调用该过程的事件过程如下：Private Sub Command1_Click() test 2End Sub则该段程序的执行结果是______ 。A．12B．23 47C．23D．5 10
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在窗体上画一个命令按钮，其名称为Command1。程序运行后，单击命令按钮，输出结果为( )。 Private Sub p1(n As Integer) For i=n To 1 Step-1 x=String(i，"*") Print x Next i End Sub Private Sub Command1_Click() p1(3) End SubA．*** ** *B．* ** ***C．* * *D．******
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在窗体上画一个名称为Command1的命令按钮，然后编写如下事件过程： Private Sub sub1(p，m，n) p=p + 1 : m = m + 1 : n =n + 1 Print p;m;n End Sub Private Sub Command1_Click() x=6 : y=4 : z=2 Call sub1(x，y+1，(z)) Print x；y；z End Sub 程序运行后，单击命令按钮，则窗体上第二行显示的内容是A．7 6 3B．7 4 2C．6 4 2D．4 6 3
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当发生Form_Click事件时，下列程序的输出结果是( )。 Private m As Integer,n As Integer Private Sub Form_Click() Dim k As Integer，p As Integer k=6：p=60 Call sub1(k,p) Print m,n,m,k,p Call sub1(k,p) Print m,n,k,p End Sub Private Sub Form_Load() m=7 n=70 End Sub Public Sub sub1(x As Integer,ByVal y As Integer) Dim m As Integer n=n+5 m=n+x+y x=x+y y=x+y End SubA．7 75 66 60 7 80 126 60B．7 75 66 60 7 75 126 60C．7 75 66 60 7 80 66 60D．7 75 66 60 7 75 66 60
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以下能够正确计算n!的程序是______。A．Private Sub Commeadl_Click() n=5: x=1 Do x=x*i i=i+1 Loop While i＜n Print x End SubB．Private Sub Command1_Click() n=5: x=1: i=1 Do x=x*i i=i+1 Loop While i＜n Print x End SubC．Private Sub Command1_Click() n=5: x=1: i=1 Do x=x*i i=i+1 Loop Whilei＜=n Print x End SubD．Private Sub Commsndl_Click() n=5: x=1: i=1 Do x=x*i i=i+1 Loop While i＞n Print x End Sub
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窗体上有两个文本框Text1、Text2以及一个命令按钮Command1，编写下列程序： DimY As Integer Private Sub Command1 Click（ ） Dim X As Integer x=2 Text1．Text=p2(p1(X)，Y) Text2．Text=p1(x) End Sub Private Function p1(X As Integer)As Integer x+x+v: y=x+y p1=x+y End Function Private Function p2(X As Integer，Y As Integer)As Integer p2=2*x+y End Function 当单击1次和单击2次命令按钮后，文本框Text1和Text2内的值分别为（ ）。A.2 4 2 4B.2 4 4 8C.4 4 8 8D.10 10 58 58
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以下能够正确计算n!的程序是( )。A．Pfivate Sub Commgld1_LClick() n=5:x=1 Do x=x*1 i=i+1 Loop Whilei＜nB．Private Sub Command1_Click() n=5:x=1:i=1 Do x=x*1 i=i+1 Loop Whilei＜n Print x End SubC．Pfivate Sub Command1_ C1ick() n=5:x=1:i=1 Do X=X*1 i=i+1 Loop While i＜=nD．Private Sub Command1_C1ick() n=5:x=1:i=1 Do X=X*1 i=i+1 Loop While i＞n Print x End Sub
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在窗体上画一个名称为Command1的命令按钮，编写如下程序： Private Sub Command1_Click() Print p1(3,7) End Sub Public Function p1(x As Single,n As Integer) As Single If n=0 Then p1=1 Else If n Mod 2=1 Then p1=x*x+n Else p1=x*x-n End If End If End Function 程序运行后，单击该命令按钮，屏幕上显示的结果是( )。A．2B．1C．0D．16
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以下能够正确计算n!的程序是( )。A．Private Sub Commandl_C1ick()B．hiVate Sub Commandl_C1ick() n＝5:x＝1 n＝5:x=1:i＝1 DO DO X＝x*1 X＝X*1 i＝i＋1 i＝i＋1 Loop while i＜n Loop While＜n Print x Ptinte x End Sub End SubC．Private Sub Commandl_Click ()D．Pdvate Sub Commandl C1ick() n＝5:X＝1:i＝1 n＝5＝:x＝1:i＝1 DO DO X＝X*1 X＝X*1 i＝i＋1 i＝i＋1 Loop While i＞n Print x Print x End Sub End Sub
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在窗体中添加一个名称为Commandl的命令按钮，然后编写如下事件代码：Private Sub Command1_Click()Dim x As Integer,y As Integerx=12：y=32Call p(x,y)MsgBox x*yEnd SubPublic Sub p(n As Integer,By Val m As Integer)n=n Mod 10m=m Mod 10End Sub窗体打开运行后，单击命令按钮，则消息框的输出结果为【 】。
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设X的分布列为,概率P(2≤X4)E.P(X
设X的分布列为，概率P(2≤X＜5)=( )。A．p2+p3+p4+p5B．p2+p3+p4C．P(X＜5)-P(X＜2)D．1-P(X＜2)-P(X＞4)E．P(X≤4)-P(X＜2)
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设随机变量X服从正态分布N(1，22)，则有（ ）。
A. P(X>1) = P(X2) = P(XC. P( X -1)
D. P( X >1) = P(X>1)+P(XE. P(0
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单选题若P（X≤x2）=0.6，P（X≥x1）=0.7，其中x2x1，则P（x1≤X≤x2）的值为（）。A
0.6B
0.7C
0.1D
0.3
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