窗体上有两个名称分别为Text1、Text2的文本框，一个名称为Command1的命令按钮。设有如下的类型声明： Type Person name As String*8 major As String*20 End Type 当单击“Command1”按钮时，能够正确地把数据写入文件的程序段是______。

A．Private Sub Command1_Click() Dim p As Person name=Text1. Text major=Text2. Text Open"C:\dat dat" For Random As #1 Put #1, 1, p Close #1 End Sub

B．Private Sub Command1_Click() Dim p As Person name=Text1.Text major=Text2. Text Open"C:\dat dat" For Random As #1 Get #1, 1, p Close #1 End Sub

C．Private Sub Command1_Click() Dis p As Person name=Text1. Text major=Text2. Text open "C:\dat dat" For Random As #1 Len=Len( Put #1, 1, p Close #1 End Sub

D．Private Sub Command1_Click() Dim p As Person name=Text1. Text major=Text2. Text Open "C:\dat dat" For Random As #1=Len( Get #1, 1, p Close #1 End Sub

以下物质中哪一个不能作为抛射剂

A．F₁₁₄

B．正丁烷

C．二氧化碳

D．乙酸乙酯

E．氮气