什么是网络服务提供者？它是如何分类的？
富氧局部增氧助燃节能技术节能的主要机理不包括（）。 提高燃烧强度、加快燃烧速度、缩短燃尽时间、促进燃烧完全。 空气自环境温度预热到一定的温度（例如60～80℃）后，再进入烟气余热回收设备，可以解决余热回收设备冷端的低温露点腐蚀问题。 减少烟气中氮气含量，增加烟气中具有强热辐射作用的二氧化碳和水分子的浓度，增强烟气热辐射作用，提高热量的利用率。 降低空气过剩系数、减少排烟量和降低排烟温度，从而减少排烟带走的热量。
You have lost datafile 4 from your database. Which is typically the fastest way to restore your database？（） Restore and recover the datafile.。 Restore and recover the tablespace.。 Restore and recover the database.。 Restore and recover the control file.。 Restore and recover the parameter file.。
A client has an existing p5 570 that is directly connected to a HMC. The customer will be purchasing another p5 570. Which of the following solutions would be appropriate to provide HMC connectivity to the second p5 570?（） Implement a proxy server to provide multiple sources to one destination 。 Purchase an additional Ethernet adapter for each p5 570 to provide connectivity between the two 。 Purchase a network hub or switch so both p5 570s can connect to the single HMC 。 Purchase an additional HMC since multiple HMC are required when more than one POWER5 Enterprise class server is used Purchase an additional HMC since multiple HMC? are required when more than one POWER5 Enterprise class server is used。
布鲁姆通过大量研究表明，儿童智力发展最迅速的时期是（） 胎儿期。 5岁之前。 6—11岁。 青春期。
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