You have recovered your Oracle Database 10g by using the control file backup because all copies of the current control file have been lost due to a media failure. You open your database by using the following statement: SQL>ALTER DATABASE OPEN RESETLOGS; Which of the following options is true about using the RESETLOGS option?()
A. The log sequence is reset to 0.
B. All the online redo logs are deleted.
C. All the archived redo logs from a previous incarnation become useless.
D. The full database backup taken from a previous incarnation can be used in future.
E. Only the control file and online redo log files are updated with a new RESETLOGS SCN and time stamp.
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装置界区节点根据以下什么信息产生()。
A. 装置界区
B. 装置
C. 侧线
()是易扩散,与空气混合,浓度达到爆炸极限的可燃气体。
A. 乙炔
B. 氢气
CO2
D. 水蒸气
不同牌号的燃油要分罐储存,因为不同牌号是由其凝固点决定的,否则会造成()。
餐车电冰箱温度调节器由()负责调定,其他人员不得调整,以免影响调节的灵敏度。
A. 维修人员
B. 餐车长
C. 厨师长
D. 定专人