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?() Replace line 3 with the following code segment. if (FileUpload1.HasFile)。 Replace line 3 with the following code segment. if (FileUpload1.FileContent.Length > 0)。 Insert the following code segment at line 6. FileUpload1.SaveAs(saveName);。 Insert the following code segment at line 6. FileUpload1.FileContent.CopyTo(new FileStream(saveName, FileMode.Open);。
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简答伟晶岩矿床的岩浆岩条件?
目前最大的计算机网络是() Internet。 Intranet。 ARPAnet。 以太网。
关系模型中数据的逻辑结构相当于一个() 字段。 元组。 二维表。 记录。
以下哪种反应器仅适合用固定化酶反应()