When performing a backup using Recovery Manager （RMAN）， which four types of files can be backed up with the RMAN BACKUP command？（） ["data file","password file","archivelog file","temporary file","online redo log file","the current control file","the tnsnames.ora file","current server parameter file"]
《电子认证服务许可证》的有效期为（） ["五年","三年","八年","十年"]
芽孢
When an operator is trying to log off the system displays this message: you have running jobs?? What does this mean?（） [" One or more processes are running in the background, preventing log off."," One or more processes are paused, requiring operator input prior to logging off."," At least one process is running in the background and it will keep running after the operator logs off"," At least one process is running in the background using nohup and it will terminate when the operator logs off"]
建设项目在主体工程开工之前，必须完成各项施工准备工作，其主要工作内容有（）。 ["施工现场的征地、拆迁","必须的生产、生活临时建筑工程","主体工程施工招标已经决标，工程承包合同已经签订","组织招标设计、咨询、设备和物资采购等服务","组织建设监理和主体工程招标投标，选定建设监理单位和施工承包企业"]
体育课的类型分：（）和（）。理论课分为（）、（）；实践课分为（）、（）、（）和（）4种。
