You plan to execute the following command to perform a Flashback Database operation in your database： SQL> FLASHBACK DATABASE TO TIMESTAMP （SYSDATE -5/24）； Which two statements are true about this？（） The database must have multiplexed redo log files。 The database must be in the MOUNT state to execute the command。 The database must be in the NOMOUNT state to execute the command。 The database must be opened in RESTRICTED mode before this operation。 The database must be opened with the RESETLOGS option after the flashback operatio。
每天施工前，召开班前交底会，由（）布置当天的施工内容，操作要求和应注意的问题，严格执行操作规程。 班组长。 施工员。 安全员。 监理员。
男性的心理误区多来自于她们特灵敏的第六感觉。（）
新兴教育社会学的学科组织方式是（）。 以学生为中心。 以教师为中心。 以教育为中心。 以能印证社会学理论为中心。
Exhibit： View the Exhibit to see the structure of the EMPLOYEES and DEPARTMENTS tables. Your organization plans to dissolve the department with department ID 30. You execute the following command to delete rows from the DEPARTMENTS table： SQL>delete from DEPARTMENTS where DEPT_ID = 30； The command fails and displays the following error： ERROR at line 1： ORA-02292： integrity constraint （HR.SYS_C005374） violated - child record found Which two actions would you take to overcome this error？（） A。 B。 C。 D。 E。 F。
主切削刃和副切削刃的交点叫（）
