[单选] Your company has a single active directory forest that has an active directory domain named na.contoso.com. a member server named server2 runs the DNS server role. The server2 DNS service hosts multiple secondary zones including na.contoso.com. you need to reconfigure server2 as a caching-only DNS server. What should you do?（）

美国的工业设计最早出现在20世纪（）年代前后，代表为沃尔特・提格。 20。 30。 40。 50。 科技论文中应使用汉字数字的地方（）。 相邻两个数字并列连用表示的概数。 带有“几”字的数字表示的概数。 含有月日简称表示事件、节日和其他特定含义的词组中的数字。 《离骚》 You are developing a new version of an existing message contract named CustomerDetailsVersion1. The new version of the message contract must add a Department field of type String to the SOAP header.You create a new class named CustomerDetailsVersion2 that inherits from CustomerDetailsVersion1. You need to ensure that all client applications can consume the service. Which code segment should you use?（） 。 。 。 。 简述影响课堂管理的因素。 Your company has a single active directory forest that has an active directory domain named na.contoso.com. a member server named server2 runs the DNS server role. The server2 DNS service hosts multiple secondary zones including na.contoso.com. you need to reconfigure server2 as a caching-only DNS server. What should you do?（）