题目内容

个人风险是指因危险化学品重大危险源各种潜在的火灾、爆炸、有毒气体泄漏事故造成区域内某一固定位置人员的个体死亡概率,即单位时间内(通常为年)的()死亡率。

A. 群体
B. 个体
C. 全体
D. 团体

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给水泵启动时油温达到()℃时应投入冷油器。

A. 30
B. 40
C. 45
D. 50

Redo log files are multiplexed in your database. The disk in which you have one of the redo log members is highly fragmented. In the process of defragmentation you lose the redo log member, which is not a member of the current group. How would you recover from the loss of the redo log member?()

A. SMON would automatically restore the lost file.
B. You would need to restore the whole database from the last backup.
C. You would need to restore the file from the last full database backup.
D. You would need to use flashback technology to restore the lost redo log member.
E. You would need to use Recovery Manager (RMAN) to restore the lost redo log member.
F. You would need to restore the missing log file by copying one of the remaining files from the same group.

电力碰并的作用只在云滴半径小于20μm时起一定的作用,否则将很小。()

A. 正确
B. 错误

将某地区30个商店按零售额多少分组而编制的分配数列,其变量值是()。

A. 零售额
B. 商店数
C. 各组的零售额
D. 各组的商店数

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