题目内容

Part B
Below is a graph showing the road accidents in one city of China. Write an essay titled Can Road Accidents Be Avoided? in three paragraphs. You are given the first sentence of each paragraph. Your part of the composition should be no less than 120 words making reference to the following points.
Can Road Accidents Be Avoided?
1) There are more and more road accidents in our cities.
2) There are many reasons for this phenomenon.
3) It's time that we took some measures.

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阅读以下应用说明以及用Visual Basic开发过程中所编写的程序代码,将应填入(n)处的字句写在对应栏内。
【应用说明】
某应用的登录界面如下:
登录界面中的文本框txtUserID和txtPassword分别用于接受用户输入的用户名和口令,命令按钮为“确定(cmdOk)”和“取消(cmdCancel)”。ADO数据控件Adodc1与数据库EmployeeData连接。在EmployeeData中,表“Users”的字段“UserID”和“Pswd”分别记录了所有的合法用户名和口令。
在登录界面中,输入正确的用户名和口令并单击“确定”按钮后,就会打开应用程序的主窗口fxmApp。用户名或密码输入错误时,给出提示信息并返回登录界面。
【Visual Basic程序代码】
Private Sub cmdOK Click()
Adodcl.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data
Source=D:\data\EmployeeData.mdb;Persist Security Info=False"
Adodcl.RecordSource = "select *(1)"
Adodcl.Refresh
Do
usrname =(2)
pwd = Adodc1.Recordset("Pswd")
Adodc1.Recordset.MoveNext
Loop Until (usrname =(3)) Or (Adodc1.Recordset.EOF)
If usrname <> txtUserID.Text Then
MsgBox "无效的用户ID, 请重新输入!", , "提示信息"
Else
If (4)Then
MsgBox "欢迎进入系统主界面!", , "提示信息"
Unload me
(5)
Else
MsgBox "无效的用户密码, 请重新输入!", , "提示信息"
End If
End If
End Sub

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