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一般认为，舍内气流速度小于0.05m/s，说明畜舍的通风换气不良；大于0.2m/s，表明舍内有风。
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环毛蚓性成成熟个体，第XIV-XVI体节色暗，肿胀，无节间沟，无刚毛，如戒指状，称为（）。
（）是指在相同的条件下，多次测量同一量时，出现的一种绝对值大小和符号不变且按某一规律变化的误差。
You are the systems engineer for your company. The company has a main office in Los Angeles and two branch offices， one in Chicago and one in New York. The offices are connected to one another by dedicated T1 lines. Each office has its own local IT department and administrative staff. The company network consists of a single Active Directory domain. All servers run Windows Server 2003. All client computers run Windows XP Professional. All servers support firmware-based console redirection by means of the serial port. The server hardware does not support any other method of console redirection and cannot be upgraded to do so. The company is currently being reorganized. The IT departments from each branch office are being relocated to a new central data center in the Los Angeles office. Several servers from each branch office are also being relocated to the Los Angeles data center. Each branch office will retain 10 servers. A new written security policy includes the following requirements： • All servers must be remotely administered for all administrative tasks. • All servers must be administered from the Los Angeles office. • All remote administration connections must be authenticated and encrypted. Your current network configuration already adheres to the new written security policy for day-to-day server administration tasks performed on the servers. You need to plan a configuration for out-of-band management tasks for each office that meets the new security requirements. Which three actions should you take？（）
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