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[单选] 防火门按其耐火极限分类,可分为甲级防火门、乙级防火门和丙级防火门三种。其耐火极限分别不低于()。

A . 1.40h、0.90h,0.60h
B . 1.50h、1.0h,0.50h
C . 1.20h、0.80h,0.60h
D . 1.20h、0.90h,0.60h

利用职权或者职务上的影响操办婚丧喜庆事宜,在社会上造成不良影响,违反了党的生活纪律。 党员干部买卖股票或者进行其他证券投资,违反了党的廉洁纪律。 You are the network administrator for the Beijing office of TestKing. A branch office is located in Cairo. The DNS servers in both locations run Windows Server 2003. The network uses two DNS namespaces internally. They are named publishing.testking.com and testking.com. The locations of the primary name servers are shown in the following table. The Beijing office contains some servers that are registered in the testking.com zone and other that are registered in the publishing.testking.com zone. All computers in the Beijing office are configured to use the local DNS server as their preferred DNS server. The two offices are connected only by using a VPN through the Internet. Various network problems occasionally result in loss of connectivity between the two offices. Firewalls prevent the DNS servers in both offices from receiving queries from the Internet. You need to configure the DNS server in the Beijing office to allow successful resolution of all queries from the Beijing office for names in the publishing.testking.com namespace, even when the VPN link between the Beijing and Cairo offices fails. What should you configure on the DNS server in the Beijing office?() In the testking.com zone, create a delegated subdomain named publishing. Specify the DNS server in the Cairo office as a name server.。 Create a secondary zone name publishing.testking.com. Specify the DNS server in the Cairo office as a master server.。 Configure conditional forwarding for the publishing.testking.com namespace. Specify the DNS server in the Cairo office as a target server.。 Create a stub zone named publishing.testking.com. Specify the DNS server in the Cairo office as a master server.。 You have configured voice VLANs on Catalyst switch R1.  Which two statements are true about the  operation of voice VLANs on this device? ()  When the voice VLAN feature is enabled, all untagged traffic is sent according to the default  CoS priority of the port.。  Enabling voice VLANs enables the switch to create multiple queues for traffic that is entering a  port.。  When voice VLANs are configured on a trunk link, UplinkFast must also be enabled.。  Voice VLANs are configured to enable the switch to forward frames marked with the proper  CoS values over separate physical links.。  Enabling voice VLANs enables the switch to forward frames with a specific 802.1P marking.。 现收现付式 防火门按其耐火极限分类,可分为甲级防火门、乙级防火门和丙级防火门三种。其耐火极限分别不低于()。
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