炉渣的流动性和碱度有关外,还和Al2O3含量有关,一般控制含量<15%。
第1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2题:
设已经在菜单编辑器中设计了窗体的快捷菜单,某顶级菜单为al,且取消其"可见"属性。运行时,可以使快捷菜单的菜单项响应鼠标左键单击和右健单击的事件过程是
A.Private Sub Form_Mouse Down(Button As Integer, Shift As Integer,_X As Single,Y As Single If Button=2 Then PopupMenu al,2 End Sub
B.Private Sub Form_Mouse Down(Button As Integer, Shift As Integer,_X As Single, Y As Single PopupMenu al,0 End Sub
C.Private Sub Form_Mouse Down(Button As Integer, Shift As Integer,_X As Single,Y As Single PopupMenu al End Sub
D.Private Sub Form_Mouse Down(Button As Integer, Shift As Integer,_X As Single,Y As Single If(Button=vbLetfButton) Or (Button=vbRightButton) Then PopupMenu al End Sub
第3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4题:
高炉炉渣三元碱度的计算公式为()
第5题:
炉渣中有些成分的升高会制约炉渣的流动性,它们是()。
第6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;
第7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ABC
B.空白
C.ABC和abc
D.出错
第8题:
炉渣中低()含量对脱S有利。
A.SiO2
B.Al2O3,P2O5,MgO
C.CaO、MnO
D.FeO、MnO
第9题:
炉渣中有些成分的升高会改善炉渣的流动性,它们是()
第10题:
高炉炉渣的碱度表达式是()。