You just completed a manual open database backup. However there seems to be a problem with the database performance. You discover that the database is generating many log switches and the LGWR is consuming lots of CPU time. You have an idea of what the problem is and you begin looking at the information in V$BACKUP and in V$DATAFILE_HEADER. What do you suspect is the problem？（） ["A","B","C","D"]
润滑脂是基础油中（石油基础油或合成基础油）用稠化剂增稠，加入添加剂。
相对于基本建设工程，下列费用项目中，较能体现养护工程费用特点的费用项目是（） ["A.研究试验费 ","B.设计费 ","C.率润及税金 ","D.路况检测费"]
Given： What is the result？（） ["B","The code runs with no output.","Compilation fails because of an error in line 12.","Compilation fails because of an error in line 15.","Compilation fails because of an error in line 18."]
社会学的研究对象是（） ["社会结构","社会运行","社会制度","社会整体结构及其运行规律"]
润湿
