计算题:一台直流发电机,其部分铭牌数据如下:PN=180kW,UN=230V,nN=1450rmin,ηN=89.5%,试求: ①该发电机的额定电流; ②电流保持为额定值而电压下降为100V时,原动机的输出功率(设此时η=ηN)
计算题:一台直流发电机,其部分铭牌数据如下:PN=180kW,UN=230V,nN=1450rmin,ηN=89.5%,试求: ①该发电机的额定电流; ②电流保持为额定值而电压下降为100V时,原动机的输出功率(设此时η=ηN)
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单击一次命令按钮后,下列程序的执行结果是( )。 Private Sub Commandl_Click() s=P(1)+P(2)+P(3)+P(4) Print s End Sub Public FunctionP(N As Integer) Static Sum Fori=1To N Sum=Sum+i Nexti P=Sum End FunctionA.15B.25C.35D.45
设有如下程序:Private Sub Form_Click()Dim n As Integer, s As Integern = 8s = 0Dos = s + nn = n - 1Loop While n 0Print sEnd Sub以上程序的功能是______。程序运行后,单击窗体,输出结果为______。
在窗体中有一个命令按钮command1,编写事件代码如下: Private Sub Command1_Click() Dim s As Integer s=P(1)+P(2)+P(3)+P(4) Debug.Print s End Sub Public Function P(N As Integer) Dim Sum As Integer Sum=0 For i=1 To N Sum=Sum+1 Next i P=Sum End Function 打开窗体运行后,单击命令按钮,输出的结果是( )。A.15B.20C.25D.35
下列过程说明合法的是( ) A、Sub S1(ByVal n!())B、Sub S1(n!) as IntegerC、 Function S1%(S1%)D、 Function S1(ByVal n!)
设程序中有如下数组定义和过程调用语句: Dim a(10)As Integer … Call D(a) 如下过程定义巾,正确的是( )。A.Private Sub p(a As Integer)B.Private Sub p(a( )As Integer)C.Private Sub p(a(10)As Integer)D.Private Sub p(a(n)As Integer)
设有如下程序: Private Sub Form. Click( ) Dim s As Long,f As Long Dim n As Integer,i As Integer f=1 n=4 For i=1 To n f=f*i s=s+f Next i Print s End Sub 程序运行后,单击窗体,输出结果是( )。A.32B.33C.34D.35
设有如下程序:Private Sub Form_Cliok()Dima As Integer,S As Integern=8s=0Dos=s+nn=n-1Loop While n>0Print sEnd Sub以上程序的功能是 [7] ;程序运行后,单击窗体,输出结果为 [8] 。
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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
有如下程序 Private Sub Command1_Chck( ) s=0 DO s=(s+1) *(s+2) N=N+1 Loop Until s>=10 Prim N;s End Sub 运行后的输出结果是A.0 1B.30 30C.4 30D.2 12
单击一次命令按钮之后,下列程序代码的执行结果为 private Sub Command1_Click() S=P(1) +P(1)+P(2)+P(3)+P(4) Print S: End Sub Public Function P(N As Integer) Static Sum For I=1 To n Sum=Sum+I Next 1 P=Sum End FunctionA.20B.35C.115D.135
设程序中有如下数组定义和过程调用语句:Dim a(10) as integer……Call p(a)如下过程定义中,正确的是A)Private Sub p(a as integer)B)Private Sub p(a() as integer)C)Private Sub p(a(10) as integer)D)Private Sub p(a(n) as integer)
在窗体中添加一个命令按钮,编写如下程序: Private Sub Test(p,m,n) p=p+1:m=m+1:n=n+1 Print "Sub: ";p;m;n End Sub Private Sub Command1.Click() a1=1:b=2:c1=3 Call Test((a,b1+3,(c1)) Print "Main:";a1;b1;c1 End Sub 程序运行后,输出结果为A.Sub: 2 6 4 Main: 2 6 4B.Sub: 2 6 4 Main: 2 6 4C.Sub: 2 6 4 Main: 1 2 3D.Sub: 2 6 4 Main: 2 2 3
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
在窗体中添加一个命令按钮,编写如下程序:Private Sub Sub1(p,m,n)p=p+1:m=m+1:n=n+1Print "sub1:";p;m;nEnd SubPrivate Sub Command1_Click()a1=1:b=2:c1=3Call Sub1(a,b1+3,c1)Print"Main:";a1;b1;c1End Sub程序运行后,输出结果为A.Sub: 2 6 4 Main: 2 6 4B.Sub: 2 6 4 Main: 2 6 4C.Sub: 2 6 4 Main: 1 2 3D.Sub: 2 6 4 Main: 2 2 3
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问答题计算题:一台直流发电机,其部分铭牌数据如下:PN=180kW,UN=230V,nN=1450rmin,ηN=89.5%,试求: ①该发电机的额定电流; ②电流保持为额定值而电压下降为100V时,原动机的输出功率(设此时η=ηN)