执行元件获得信号后要延迟一段时间才动作的继电器叫做()继电器。
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卡特3512TA.3512B柴油机汽缸数为()。
A. 6缸
B. 8缸
C. 12缸
D. 16缸
Which statement is true regarding checkpoints and recovery?()
A checkpoint defines the highest system change number (SCN).
B. All redo entries higher or at the SCN are known to be written to the data files.
C. Only the redo records containing SCNs higher then the checkpoint need to be applied during recovery.
D. The LOG_CHECKPOINT_INTERVAL initialization parameter specifies the amount of time between incremental checkpoints.
负责统筹拟定医疗保险、生育保险等政策规划和标准的政府部门是()
A. 卫生行政部门
B. 公安部门
C. 人力资源和社会保障部门
D. 工业和信息产业部门