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。
Where is the run date for an ‘at’job located?（） Within the job environment set up。 Within the user data of the at job。 In the file name preceeded with a userid。 In a special file used by the cron daemo。
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。
kristin wants to build an action which exits the video form. the action will be avaiable only when the user is reading the document ,which one of the following accomplish this ? （） @ command([back]) 。 @ command([fileexit]) 。 @ command([gotoview]) 。 @ command([fileclosewindow])。
预测方法分类体系中根据模型的特点可分为经验预测模型和正规预测模型，其中正规预测模型包括（）。
