（）是衡量企业资金效益的临界基准。 [" 市盈率"," 利润率"," 生产经营成本"," 资本成本"]
You deployed new fibers in your network to replace copper spans that were too long. While reconnecting the network，you experienced network problems because you reconnected wrong fibers to wrong ports. What could you do to prevent this type of problem in the future，particularly when connecting and reconnecting fiber pairs？（） ["Only use fiber in pairs.","Configure root guard on your switches.","Do not use fiber but use copper.","Configure UDLD to prevent one-way link conditions."]
总设计师的工作职责是（） ["通常同时负责一个或一个以上的设计项目，主持或组织制定每一设计项目的总方案，确定设计的总目标、总计划、总基调，界定设计的总体要求和限制","负责某一具体设计项目","负责设计项目中某一部分的设计工作","协助设计师完成其负责部分的设计制作"]
主耶稣问门徒说；众人说我是谁？他们是怎么回答的？
摘下公务电话时，拨203，立刻听到忙音，则下面说法正确的是（） ["本站公务号为203","对端站未挂机","203为空号","OHP板故障"]
第二条rate-limit的作用是什么？
