下列（）是“图像占位符”的属性。 名称（name）。 .Z軸（Z-index）。 位置（location）。 可见性（Visibility）。
You develop a Windows Communication Foundation (WCF) service that interacts with Microsoft Message Queuing (MSMQ). The service requires sessions. You need to create a custom binding that enables messages sent to the queue to be viewed when you are using a listener tool. Which binding elements should you use?（） textMessageEncoding and msmqTransport in this order.。 textMessageEncoding and msmqIntegrationTransport in this order.。 msmqTransport and textMessageEncoding in this order.。 msmqIntegrationTransport and textMessageEncoding in this order.。
Your company has an Active Directory domain named ad.contoso.com. The domain has two domain controllers named DC1 and DC2. Both domain controllers have the DNS Server server role installed. You install a new DNS server named DNS1.contoso.com on the perimeter network. You configure DC1 to forward all unresolved name requests to DNS1.contoso.com. You discover that the DNS forwarding option is unavailable on DC2. You need to configure DNS forwarding on the DC2 server to point to the DNS1.contoso.com server. Which two actions should you perform（） Clear the DNS cache on DC2.。 Delete the Root zone on DC2.。 Configure conditional forwarding on DC2.。 Configure the Listen On address on DC2.。
You have an SQL query that takes one minute to execute. You use the following code segment to execute the SQL query asynchronously.Dim ar As IAsyncResult = cmd.BeginExecuteReader()You need to execute a method named DoWork() that takes one second to run while the SQL query is executing. DoWork() must run as many times as possible while the SQL query is executing. Which code segment should you use?（） While ar.AsyncWaitHandle Is Nothing DoWork()End Whiledr = cmd.EndExecuteReader(ar)。 While Not ar.IsCompleted DoWork()End Whiledr = cmd.EndExecuteReader(ar)。 While T hread.CurrentThread.ThreadState = ThreadState.Running DoWork()End Whiledr = cmd.EndExecuteReader(ar)。 While Not ar.AsyncWaitHandle.WaitOne() DoWork()End Whiledr = cmd.EndExecuteReader(ar)。
水泥密度的测定过程中，将无水煤油注入李氏比重瓶时，液面应在0mL至1mL之间，读数以弯液面下部为准。
27系列EPROM存储的数据是（）可擦除的。
