钻削的切削速度，指钻孔时钻头外径上任一点的（）。
以自动控制的现场调节器转换成手动控制时正确的方法是：（） 用减压阀把手控输出调到0%再转换。 用减压阀把手控输出调到100%后再转换。 用减压阀使手控输出与自动输出平衡后再转换。
法人验收包括分部工程、（）、单项合同工程验收等环节。项目法人可以根据工程建设的需要增设法人验收的环节。 单位工程。 法人工程。 总部工程。 多项工程。
简述社会变迁与教育的关系。
You are maintaining the database in Oracle10g. You are performing an incomplete recovery by using RMAN because an important table， EMPLOYEE， is dropped and purged from the Recycle Bin. Which statement is NOT true regarding an incomplete recovery？（） The target database must be in the MOUNT mode to ensure restoration of the datafiles.。 You can restore the datafiles from the backup by using the RMAN utility only if the backups were taken using the RMAN utility.。 The control file must be recreated.。 The database must be opened with the RESETLOGS option.。
You are maintaining your database in ARCHIVELOG mode. An important table， SCOTT.EMPLOYEE， is dropped and purged from the Recycle Bin on Monday at 2：00 P.M. You do not use RMAN to perform backups. You performed the last full user-managed backup at 9：00 P.M. on Sunday. How will you recover the dropped table， SCOTT.EMPLOYEE？（）
