What is the impact of the results of the output of the following command?() RMAN> report unrecoverable database; Report of files that need backup due to unrecoverable operations File Type of Backup Required Name 4 full or incremental C:\ORACLE\ORADATA\ORCL\USERS01.DBF
A. There are no backup sets with any backups of the users01.dbf datafile.
B. The users01.dbf datafile has had unrecoverable operations occur in it. It will need to be backed up or some data loss is possible during a recovery.
C. The users01.dbf datafile is corrupted.
D. The users01.dbf datafile backup exceeds the retention criteria.
E. The last backup of the users01.dbf datafile failed and must be rerun.
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根据《2006海事劳工公约》,责任由公共当局承担,国家法律或条例可免除船东支付船上医疗费用及膳宿和丧葬费用的责任,包括()。 ①在船舶服务之外发生的其他受伤; ②在接受雇用时故意隐瞒的疾病或病症; ③受伤或患病是因患病、受伤或死亡海员的故意不当行为所致。
A. ①③
B. ①②
C. ②③
D. ①②③
男,45岁,既往有肺结核及哮喘反复发作史。半小时前上楼时,突发呼吸困难及右侧胸痛。查体:明显呼吸困难,发绀,端坐呼吸,大汗,烦躁,颈静脉充盈,气管轻度左偏,桶状胸;双肺叩诊过清音,右侧略带鼓音;右肺呼吸音低,左肺可闻哮鸣音。应进行何种检查才能确诊()
A. 肺功能
B. 血气分析
C. 胸部X线
D. 心电图
E. 胸部B超
间接进化控制是由()作用于系统模型,再综合系统状态输出与系统模型输出作用于进化学习,然后,系统在应用一般闭环反馈控制原理构成进化控制系统。
指点信标的场地保护区是一个以75米为半径的圆。
A. 正确
B. 错误