狭义上的纳税主体包括（）。 ["法律、行政法规规定负有纳税义务的单位","法律、行政法规规定负有纳税义务的个人","法律、行政法规规定负有代扣代缴、代收代缴税款义务的单位","法律、行政法规规定负有代扣代缴、代收代缴税款义务的个人"]
You issued the following statement： SQL> ALTER DATABASE BACKUP CONTROLFILE TO TRACE； What will be the result of issuing the statement？（） [" The control file will be multiplexed."," The control file will be recreated.","The script containing the CREATE CONTROLFILE statement will be created."," The binary backup of the control file will be created."]
水电建设工程个别专业性强的项目，在分包时应按要求对分包单位进行评价，合格者经监理单位审查同意后，出具书面意见报项目法人批准。分包部分不宜超过合同工作量的（）。 ["A.20 ","B.30 ","C.40 ","D.50"]
You need to perform a block media recovery on the tools01.dbf data file in the SALES database by using Recovery Manager (RMAN). Which two are the prerequisites to perform this operation? （）(Choose two) [" You must configure block change tracking file"," You must have first level 1 backups for RMAN to restore blocks"," You must ensure that the SALES database is mounted or open"," You must have full or level 0 backups for RMAN to restore blocks"," You must take the tools01.dbf data file offline before you start a block media recovery"]
You are maintaining your database in Oracle10g. You are performing an incomplete recovery because the tablespace， DATA1， was dropped and purged from the Recycle Bin. After performing an incomplete recovery， you open the database with the RESETLOGS option. What will NOT be the impact of using the RESETLOGS option？（） [" The log sequence for the database will restart from 1."," The log sequence number will be written to the control file."," The log sequence number will be written to the datafile headers."," The log sequence number will be written to the initialization parameter file."]
废水处理中变异现象有哪几方面？
