正常情况下，不是液化石油气组分的是（）。 乙烷。 丙烷。 丙烯。 丁烯。
千分尺可以测量转动的被测表面。
The job to gather optimizer statistics for objects runs as part of the automatic maintenance window inyour database instance. At a certain point of time， the maintenance window closes before the statisticsare gathered for all objects. Which statement is true in this scenario（） The statistics collection continues until all objects are processed.。 The job is terminated and the statistics collected are restored to a time before the job started.。 This produces an error and the statistics collected are locked until the next time that the maintenancewindow is opened.。 The job is terminated and the statistics for the remaining objects are collected the next time that themaintenance window is opened.。
How can the command-line Coherence application in Windows and UNIX be started ？（） navigate to the $COHERENCE_HOME directory and type bin\coherence.cmd （Windows） or ./bin/coherence.sh （UNIX）。 navigate to the $COHERENCE_HOME directory and type coherence.cmd （Windows） or bin/coherence.sh （UNIX）。 navigate to the $COHERENCE_HOME directory and type bin\coherence.cmd （Windows） or coherence.sh （UNIX） 。 All of the above。
下列不属于开孔完毕的表现的是（） 能继续向下摇主轴。 向上摇主轴明显感觉比原来沉重。 听不到开孔刀切割管壁的声音。 主轴难以提取。
Which three actions are required to configure the Flashback Database？（）
