外窗台采用砖窗台时，砖窗台有平砌挑砖和立砌挑砖两种做法，挑出尺寸大多为（）。
A. 40mm
B. 60mm
C. 80mm
D. 100mm
防坠落辅助设备按设计负载分为轻型和通用型两类，轻型负载1.33kN，通用型负载2.50kN。
A. 正确
B. 错误
从事评审、审核等认证活动的人员，应当经过（）注册后，方可从事相应的认证活动。
A. 认证机构
B. 认可机构
C. 国家认监委
Which two of these steps are minimum requirements to configure OSPFv3 under IPv6？（）
A. Configure a routing process using the command ipv6 router ospf [process-id].
B. Add the network statement for the interfaces on which OSPF will run.
Configure OSPF on the interface that it will run on.
D. Use the passive-interface command on the interfaces on which OSPF should not run.
Enable routing.
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