简述意外伤害的含义。
You have just performed a FLASHBACK TABLE operation using the following command： flashback table employees to scn 123456； The employees table has triggers associated with it. Which of the following statements is true regarding the state of the triggers during the Flashback Table operation？（） [" All the triggers are disabled."," All the triggers are enabled by default."," Enabled triggers remain enabled and disabled triggers remain disabled."," Triggers are deleted when a Flashback Table operation is performed."]
目前使用的国家体质健康标准规定总分在（）分以上为优秀，（）分为良好，（）分为及格。
血小板聚集途径以下哪项是错的（） ["ADP途径","TXA2途径","VWF途径","PAF途径"]
The job to gather optimizer statistics for objects runs as part of the automatic maintenance window in yourdatabase instance. At a certain point of time， the maintenance window closes before the statistics are gatheredfor 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"]
什么是外在动机外在动机有什么积极和消极作用？
