题目内容

计算机病毒是可以造成计算机故障的()

A. 一种微生物
B. 一种特殊的程序
C. 一块特殊芯片
D. 一个程序逻辑错误
E. 一条命令

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阐述分组交换机的主要性能指标有哪些。

You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. You create a Web page that has a GridView control named GridView1. The GridView1 control displays the data from a database named Region and a table named Location. You write the following code segment to populate the GridView1 control: 01 protected void Page_Load(object sender, EventArgs e) 02 { 03 string connstr; 04 05 SqlDependency.Start(connstr); 06 using (SqlConnection connection = 07 new SqlConnection(connstr)) 08 { 09 SqlCommand sqlcmd = new SqlCommand(); 10 DateTime expires = DateTime.Now.AddMinutes(30); 11 SqlCacheDependency dependency = new 12 SqlCacheDependency("Region", "Location"); 13 Response.Cache.SetExpires(expires); 14 Response.Cache.SetValidUntilExpires(true); 15 Response.AddCacheDependency(dependency); 16 ► 17 sqlcmd.Connection = connection; 18 GridView1.DataSource = sqlcmd.ExecuteReader(); 19 GridView1.DataBind(); 20 } 21 } You need to ensure that the proxy servers can cache the content of the GridView1 control. Which code segment should you insert at line 16?()

A. Response.Cache.SetCacheability(HttpCacheability.Private);
B. Response.Cache.SetCacheability(HttpCacheability.Public);
C. Response.Cache.SetCacheability(HttpCacheability.Server);
D. Response.Cache.SetCacheability(HttpCacheability.ServerAndPrivate)

胸部摄影对滤线栅栅比的要求一般是()

A. 6:1
B. 8:1
C. 10:1
D. 12:1
E. 16:1

1个“Proof”相当于()的酒精含量。

A. 2%
B. 1.75%
C. 1%
D. 0.5%

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