单项选择题 您正在测试一个组件，该组件对Meeting 类实例进行序列化处理，以使它们能够保存到文件系统。 Meeting具有如下定义： public class Meeting { private string title; public int roomNumber; public string[] invitees; public Interview(){ } public Interview (string t){ title = t; } } 组件包含一个带有以下代码段的过程 Meeting myMeeting = new Meeting("Objectives"); myMeeting.roomNumber=20; string[] attendees = new string[2]{"Amy", "Ally"}; myMeeting.invitees = attendees; XmlSerializer xs = new XmlSerializer(typeof(Meeting)); StreamWriter writer = new StreamWriter(@"C:\Meeting.xml"); xs.Serialize(writer, myMeeting); writer.Close();/ 您需要确定作为运行此过程的结果写入C:\Meeting.xml 文件的XML 块。 哪个XML 块代表将写入C:\Meeting.xml 文件的内容？（）

单项选择题 您使用下面的代码片段来创建了一个汽车类 。 public class Vehicle { [XmlAttribute(AttributeName = "category")] public string vehicleType; public string model; [XmlIgnore] public int year; [XmlElement(ElementName = "mileage")] public int miles; public ConditionType condition; public Vehicle() { } public enum ConditionType { [XmlEnum("Poor")] BelowAverage, [XmlEnum("Good")] Average, [XmlEnum("Excellent")] AboveAverage }} 您创建了一个汽车类的实例. 您需要填充车辆类实例中下表所示的公共的字段。 MemberValuevehicleTypecarmodelraceryear2002miles15000conditionAboveAverage 需要确定此车辆类实例序列化时产生的 XML 块。 哪些XML块能表示序列化车辆实例的输出？（）

单项选择题 You are creating a new security policy for an application domain. You write the following lines of code.  PolicyLevel policy = PolicyLevel.CreateAppDomainLevel（）；  PolicyStatement noTrustStatement =    new PolicyStatement（  policy.GetNamedPermissionSet（"Nothing"））； PolicyStatement fullTrustStatement =    new PolicyStatement（  policy.GetNamedPermissionSet（"FullTrust"））；  You need to arrange code groups for the policy so that loaded assemblies default to the Nothing permission set. If the assembly originates from a trusted zone， the security policy must grant the assembly the FullTrust permission set.  Which code segment should you use？（）