Refer to the exhibit. A network administrator wants to reduce the number of OSPF routes advertised from Area 1 into Area 2. As the router configuration specialist, what two things would you do to accomplish this goal?（） [" Enter the configuration on router B1."," Enter the configuration on router B4."," On the same router, enter the Summary - address 10.10.1.0 255.255.255.128 subcommand."," On the same router, enter the Area 1 range 10.10.1.0 255.255.255.128 subcommand."," On the same ro uter, enter the Area 2 range 10.10.1.0 255.255.255.128 subcommand."]
内省
系统总体结构
客运职工在顺线路行走时，应走（）。 ["轨心","轨面","轨枕头","路肩"]
《清明上河图》是以宋代都城汴梁市民生活为主题的长卷绘画作品，描绘了清明时节，北宋京城汴梁以及汴河两岸繁华的景象和自然风光，是历代风俗画创作的典范。唐代画家阎立本的《步辇图》描绘唐太宗乘步辇接见来迎娶文成公主的吐蕃使臣禄东赞的情景，也是一件具有重要历史价值和艺术价值的作品。虽然这两件作品所表现的对象大为不同，但是因为艺术家的创造性劳动使作品的艺术美超越了现实美，因而都是艺术珍品。
简述密封油差压调节阀的作用及工作原理？
