[多选]
You are developing an ASP.NET Web page. You add the following markup to the page.
You add the following code segment to the code-behind.
You need to save the uploaded file and display a message to the user that indicates that the upload either succeeded or failed. Which two actions should you perform？（）

A . Replace line 3 with the following code segment. if （FileUpload1.HasFile）
B . Replace line 3 with the following code segment. if （FileUpload1.FileContent.Length > 0）
C . Insert the following code segment at line 6. FileUpload1.SaveAs（saveName）；
D . Insert the following code segment at line 6. FileUpload1.FileContent.CopyTo（new FileStream（saveName， FileMode.Open）；

达到初、终凝时间时，应立即重复测定，当两次结论相同时才能确定达到初终凝时间。什么叫弹性？ OSI参考模型中，以帧为单位传送数据的是（）物理层。数据链路层。网络层。表示层。简答伟晶岩矿床的岩浆岩条件？简述《定西市安全生产“党政同责、一岗双责”制度实施细则》的适用范围。

You are developing an ASP.NET Web page. You add the following markup to the page.
You add the following code segment to the code-behind.
You need to save the uploaded file and display a message to the user that indicates that the upload either succeeded or failed. Which two actions should you perform？（）

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