题目内容

整体式升降脚手架制动距离≤()mm.

A. 70
B. 80
C. 90

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Which two statements about Layer 3 MPLS VPN are true?()

A. The virtual routing and forwarding table is separate from the global routing table that exists on PE routers. Routes are injected into the VRF from the CE-PE routing protocols for that VRF and any MP-BGP announcements that match the defined VRF RTs
B. Multiprotocol Border Gateway Protocol is run between PE and CE routers to exchange customer prefixes in a VPNv4 format
C. A customer edge router peers at Layer 3 to the provider edge. The PE-CE interface runs either a dynamic routing protocol (eBGP, RIPv2, EIGRP, OSPF) or a static routing protocol (Static, Connected)
D. VPNv4 address is the combination of the RT and customer IPv4 prefix. These VPNv4 prefixes are passed in MP-BGP

船用锅炉常用高低火燃烧来控制锅炉的蒸汽压力,其主要目的是()。

A. 保证最佳的燃烧风油比
B. 提高锅炉的经济性
C. 保证压力恒定
D. 避免锅炉的频繁启动

驾驶员座椅上的安全带()

A. 和客舱座椅使用的安全带形式不一样,采用2点式固定
B. 和客舱座椅的安全带形式一样,但件号不一样,不能替代
C. 和客舱座椅的安全带形式一样,可以被客舱座椅安全带替代
D. 和客舱座椅的安全带形式有很大不同,采取多点固定,不可以被客舱座椅安全带替代

关于E-RAB的描述错误的是()

A. E-RAB是指控制平面的承载
B. E-RAB建立由eNodeB发起
C. 用于UE和CN之间传送控制信令
D. E-RAB建立成功率统计要包含三个过程:初始Attach过程,Service Request过程和Bearer建立过程

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