医疗器械经营企业不得经营（）的医疗器械。 未经注册。 无合格证明。 过期。 失效或者淘汰。
数据精确它是一种（）的变革。 物联网。 文化。 新技术。 移动通信。
Your company, Contoso, Ltd., has a main office and a branch office. The offices are connected by a WAN link. Contoso has an Active Directory forest that contains a single domain named ad.contoso.com. The ad.contoso.com domain contains one domain controller named DC1 that is located in the main office. DC1 is configured as a DNS server for the ad.contoso.com DNS zone. This zone is configured as a standard primary zone. You install a new domain controller named DC2 in the branch office. You install DNS on DC2. You need to ensure that the DNS service can update records and resolve DNS queries in the event that a WAN link fails. What should you do（） Create a new stub zone named ad.contoso.com on DC2.。 Configure the DNS server on DC2 to forward requests to DC1.。 Create a new secondary zone named ad.contoso.com on DC2.。 Convert the ad.contoso.com zone on DC1 to an Active Directory-integrated zone.。
允许信号同时在两个方向上流动的数据传输方式叫做（）。
与教学插动相比，游戏和区域活动最突出的特点是（）。 自主性。 计划性。 娱乐性。 目的性。
7～8个月的婴儿适应周围人物的能力和行为表现为（）。
