A system administrator wants to configure a system so that all new users will be put into the database group by default. How would this be accomplished？（） ["remove all other groups from the system","run the command mkuser -default "GROUP=database"","change the default group in \/usr\/lib\/security\/mkuser.default","edit \/etc\/security\/group to move all users to the database stanza"]
焦虑性失眠首选药物（）。
What can be done to enable the debug information for functions to be displayed when using ‘ksh - x’to debug a script?（） ["Run the script using 'ksh -fx'.","Run the script using 'ksh -a function -x'.","Edit the script and add 'set -x' at the beginning.","Edit the script and add 'set -x' at the beginning of each function."]
A customer requires a 2-way solution now that will be the easiest and least disruptive to upgrade to a 4-way in the future. Which of the following solutions best matches these requirements？（） ["p630 2-way Active 2-way Inactive","p655 2-way Active 2-way Inactive","p5-520 2-way Active 2-way Inactive","p5-550 2-way Active 2-way Inactive"]
下面关于VTP的论述中，错误的是（）。 ["静态修剪就是手工剪掉中继链路上不活动的VLAN","动态修剪使得中继链路上所有共享的VLAN都是活动的","静态修剪要求在VTP域中的所有交换机都配置成客户机模式","动态修剪要求在VTP域中的所有交换机都配置成服务器模式"]
请简述仓库的经济功能和服务功能。
