对声测管的要求包括下列哪些选项？（） ["水密性良好，不漏浆","与混凝土粘结良好，不产生剥离缝","管内无异物，保证畅通","管与管之间相互平行","接口连接平整畅通"]
《中华人民共和国铁路法》国家铁路是指由国务院铁路主管部门管理的铁路。
Which three factors have the biggest influence on OSPF scalability？（） ["Flooding paths and redundancy","Amount of routing information in the OSPF area or routing domain","Number of routers with Cisco Express Forwarding enabled","Number of neighbor adjacencies","Other routing protocols in use","OSPF timer reconstruction negotiation","Redistribution with BGP neighbors","Redistribution with other IGP routing protocols， such as RIP or EIGRP"]
下列关于声测管的说法中，哪些是正确的？（） ["管材应有足够的强度和刚度","管材应有较大的透声率","声测管底部应封闭","声测管的连接处应有足够的水密性，在较高的静水压下不漏浆"]
改编、翻译、注释、整理已有的作品而产生的新作品，其著作权属于（）。 ["创作新作品的著作权人","原作者著作权人","继受著作权人","合作著作权人"]
简述教育法实施的含义及方式。
