给婴儿进行抚触，适宜时间为（）。 50～60分钟。 40～50分钟。 30～40分钟。 10～15分钟。
生产安全事故调查处理应当遵循的原则是？
You develop a Windows Communication Foundation (WCF) service to generate reports. Client applications call the service to initiate report generation but do not wait for the reports to be generated. The service does not provide any status to the client applications. The service class is defined as follows. (Line numbers are included for reference only.) 01 [ServiceContract] 02 public class ReportGeneratorService 03 { 04 ... 05 private int GenerateReports(int clientID) 06 { 07 ... 08 return 0; 09 } 10 } You need to ensure that client applications can initiate reports without waiting for status. Which two actions should you perform (Each correct answer presents part of the solution. Choose two.) （）。 Insert the following code at line 04. [OperationContract(IsOneWay=true)]。 Insert the following code at line 04. [OperationContract(AsyncPattern=false)]。 At line 05, change the GenerateReports method from private to public.。 Remove line 08. At line 05, change the return type of GenerateReports method to void.。
Your company has a main office and 10 branch offices. Each branch office has an Active Directory site that contains one domain controller. Only domain controllers in the main office are configured as Global Catalog servers. You need to deactivate the Universal Group Membership Caching option on the domain controllers in the branch offices. At which level should you deactivate the Universal Group Membership Caching option（） Site。 Server。 Domain。 Connection object。
您正在开发自定义集合类。您需要在类中创建方法。您需要确保在类中创建的方法返回与Foreach语句兼容的类型。该方法应满足哪个条件？（） 该方法必须返回IEnumerator或IEnumerable类型。 该方法必须返回IComparable类型。 该方法必须明确包含集合。 该方法必须是类中唯一的迭代器。
Which of the following is not a typical maintenance task within a network maintenance model？（）
