题目内容

听觉感受器是()膜迷路包括()迷路壁上有()鼓室的外侧壁是()

A. 蜗管
B. 鼓膜
C. 螺旋器
D. 前庭窗
E. 前庭

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视杯外层形成视网膜色素上皮层,视杯内层分化为视网膜神经感觉层。

A. 正确
B. 错误

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。

A. 电压
B. 时间
C. 磁力
D. 压力

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.

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