It is shown that men have         as women do on average while driving according to recent statistics.

A．twice as many serious accidents

B．serious accidents as twice many

C．twice serious accidents as many

D．serious accidents as many twice

【说明】 以下代码实现了当用户退出界面时，判断TextEdit中的文字是否发生改变，弹出对话框判断，让用户选择是否保存文件或取消退出界面操作。阅读下面的代码，将其补充完整。 【代码7-1】 Begin VB.Form Forml //...窗体描述(略) Begin VB.TextBox TextEditHeight = 1830Left = 180Tablndex= 0Text = "TextEdit"Top = 360Width = 3885 End //...窗体描述(略) End 【代码7-2】 Dim txtchange As Boolean Dim myval As String Private Sub Form Load () TextEdit.Text: "CIU, 中国软考联盟!" txtchange = False End Sub 【代码7-3】 Private Sub TextEdit_Change () Static notchange As Boolean (1) notchange = Tree End Sub Private Sub Form_Unload ( Cancel As Integer )Dim myval As StringIf (2) Then myval = MsgBox ( "保存文件的更改吗", vbYesNoCancel, "提示信息" ) If (3) ThenMsgBox "保存成功"End End If If (4) Then End If (5) Then Cancel = 1 End If End Sub