《信息系统工程监理单位资质等级评定条件（2012年修定版）》从2012年（）月开始施行。 ["A.5 ","B.6 ","C.7 ","D.8"]
When is a first-hop redundancy protocol needed in the distribution layer？（） [" when the design implements Layer 2 between the access arid distribution blocks"," when multiple vendor devices need to be supported"," when preempt tuning of the default gateway is needed"," when a robust method of backing up the default gateway is needed"," when the design implements Layer 2 between the access switch and the distribution blocks"," when the design implements Layer 2 between the access and distribution block"]
重大活动消防安保工作原则有（）。 ["坚持预防为主的原则","坚持依法管理的原则","厉行节约的原则","坚持安全第一的原则","坚持群众参与的原则"]
某投资项目的间接效益和间接费用可以忽略不计，其国民经济效益费用流量表（国内投资）如表3-2所示。试计算该项目国内投资的经济内部收益率。
在压力表的机芯型号YC-100-11-14中，YC代表（） ["机芯代号","配用压力表外径尺寸","轴齿轮材料代号","轴齿轮齿数"]
护理道德的范畴是什么
