You are using RMAN to perform a closed database backup of your database. You issue these RMAN commands： STARTUP MOUNT； BACKUP FORMAT ’/BACKUP/df_%d_%s_%p.bus’ DATABASE filesperset = 2； Which components are included in the backup？（） ["Only the data files.","Only the data files and the online logs.","The data files， control files， and the online logs.","The data files and control files， but not the online logs."]
微生物产生能量后，（）不是能量消耗的主要方面。 ["营养物质的主动吸收","物质合成","生物发光","物质分解"]
“从‘有我之境’转向‘无我之境”，是评沦家李庆西对（）文学艺术特点的归纳。
What is the result？（） ["1","12","14","123","Compilation fails.","An exception is thrown at runtime."]
在转动惯量和飞轮转矩的折算中，不用的原则是（） ["功率守恒原则","动能守恒原则","动量守恒原则","位能守恒原则","势能守恒原则"]
起动机传动装置由哪些部件组成？其中滚柱式单向离合器是如何工作的？
