根据电网安全风险值大小，电网安全风险分为五级，Ⅰ级（特大风险）、Ⅱ级（重大风险）、Ⅲ级（较大风险）、Ⅳ级（一般A类风险）和Ⅴ级（一般B类风险），依次用（）表示。
A. 红色、橙色、黄色、蓝色和白色
B. 红色、橙色、黄色、白色和蓝色
C. 红色、黄色、橙色、蓝色和白色
D. 红色、橙色、蓝色、黄色和白色
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饭店员工的职业守则主要内容是：（）；遵纪守信；文明礼貌，优质服务；团结合作，顾全大局；安全操作，注重环保。
A. 热情有礼，客人第一
B. 热情友好，宾客至上
C. 热情接待，待客大方
D. 热情款待，宾客第一
基层党支部应着力增强的“三种能力”是指：解决自身问题的能力、领导单位全面建设的能力和组织基层官兵军事训练的能力.
A. 正确
B. 错误
You are working on the PROD database， which is in NOARCHIVELOG mode. You lost the active online redo log group due to a media failure. How should you recover your database？（）
A. Restore the database from a whole consistent backup and start the database in MOUNT mode. Then， open the database with the RESETLOGS option after performing a cancel-based recovery.
B. Restore the database from a whole consistent backup and start the database in MOUNT mode. Then， drop the lost redo log group and open the database with the RESETLOGS option after performing a cancel-based recovery.
C. Restore the database from a whole consistent backup and start the database in MOUNT mode. Then， clear the lost redo log group and open the database with the RESETLOGS option after performing a cancel-based recovery.
Do nothing. You do not need to recover the database in this case； an instance recovery will be performed by the SMON process on startup.
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