Note the following structures in your database server： 1.Extents 2.OS Blocks 3.Tablespace 4.Segments 5.Oracle Data Block Which option has the correct arrangement of these structures from the smallest to the largest（） 2，5，1，4，3。 1，2，3，4，5。 5，2，1，3，4。 2，1，5，4，3。
单位工程投入使用验收的主要工作包括（）。 A.检查工程是否已按批准设计完建 。 B.检查建设征地、移民迁移安置和库底清理落实情况 。 C.进行工程质量鉴定并对工程缺陷提出处理要求 。 D.检查工程是否已具备安全运行条件 。 E.对验收遗留问题提出处理要求。
A customer has an existing rack environment with 18 x365 and 2 x255 servers. How can the customer monitor and manage the hardware even if the systems are shut down？（） Use PC Anywhere over the Ethernet LAN.。 Use RDM and Aurema to manage the systems.。 Connect high-speed modems to each of the systems’ serial ports to use IBM Director.。 Interconnect the Remote Supervisor Adapters II （RSA II） in the x365 servers to the x255 servers.。
Which procedure should be used to configure the system to prevent all users from using the ’at’ command（）？ Create a /var/adm/cron/at.allow file with no entries。 Create a /var/adm/cron/at.deny file with ’*’ as the only entry。 Create a /var/adm/at/at.deny file with ’ALL’ as the only entry。 Create a /var/adm/at/at.allow file with ’NONE’ as the only entry。
浇水、施肥
If two windows overlap， which window attribute will determine whether one should be chosen over the other？（）
