市场机制作为市场经济最基本的调节机制，其特点是（）。 ["独立性、滞后性、客观性、自发性、灵活性","客观性、关联性、自发性、灵活性、超前性","关联性、自发性、滞后性、客观性、灵活性","自发性、机械性、关联性、滞后性、客观性"]
Which three statements are true about the Internet Group Management Protocol (IGMP)? （） [" There are three IGMP modes: dense mode, sparse mode, and sparse - dense mode"," IGMP is used to register individual hosts with a multicast group"," IGMP version 3 enables a multicast receiving host to specify to the router which sources it should forward traffic from"," IGMP messages a re IP datagrams with a protocol value of 2, destination address of 224.0.0.2, and a TTL value of 1"," IGMP is a multicast routing protocol that makes packet - forwarding decisions independent of other routing protocols such as EIGRP"," IGMP snooping ru ns on Layer 3 router"]
根据《城市道路管理条例》的有关规定，城市供水、排水、燃气、热力、供电、通信、消防等依附于城市道路的各种管线、杆线等设施的建设计划，应与城市道路发展规划和年度建设计划相协调，坚持（）的施工原则，与城市道路同步建设。 ["“先地下，后地上”","“先地上，后地下”","“先发展，后改造”","“先改造，后发展"]
强化上级纪委对下级纪委的领导，纪委发现同级党委主要领导干部的问题，可以直接向上级纪委报告。
在个人住房贷款业务中，可以作为借款申请人偿还能力证明材料的有（）。 ["过去1个月的工资单","过去半年的银行卡对账单","过去1年的存折对账单","投资经营收入证明","房产证"]
皮电反应
