Which of the following commands indicates the packet count for each interface？（） ["lsattr","route","netstat","ifconfig"]
You are using Recovery Manager (RMAN) to perform backups. In which three situations would you perform a compressed backup?（） [" You are backing up to tape and your tape device performs its own compression."," You are making image copies, and you have not enabled tablespace compression."," You are using disk-based backups and disk space in your Flash Recovery Area, or other disk-based backup destinations are limited."," You are performing your backups to some device over a network where reduced network bandwidth is more important than CPU usage."," You are using some archival backup media, such as CD or DVD, where reducing backup sizes saves media costs and archival storage."]
大二男生张三，屡次在考试中出现不及格。辅导员问其原因时，张三总是回答：“老师出的题目太难”，或“我都认真复习了，但老师出题太偏”，或“没地方看书，寝室和教室都太吵，图书馆位子又太少”。而辅导员从其他同学处了解到的情况则是：“他在谈恋爱，根本没看他看什么书。”该生对自己行为的归因属于（）。 ["不稳定性、内在性、可控归因","外在性、不可控归因","不稳定性、内在性、不可控归因","稳定性、内在性、不可控归因"]
Which of the following is true of an index used to support a UNIQUE constraint?（） ["It must have the UNIQUE attribute.","It cannot be created explicitly by the user.","It must have the UNIQUE and CLUSTER attributes.","It must have the UNIQUE WHERE NOT NULL attribute."]
路由器命令R1（config）#inprouting的作用是（）。 ["显示路由信息","配置默认路由","激活路由器端口","启动路由配置"]
餐饮企业组织机构设置应遵循的基本原则包括哪些？
