简述学前儿童游戏教育实施的组织内容。
In which scenario， will you issue the following command？（） RMAN> REPORT NEED BACKUP DAYS 7； [" to configure RMAN to maintain backup information in the RMAN repository for seven days"," to configure RMAN to maintain backup information in the control file for at least seven days"," to display the list of files that have not been backed up for the last seven days"," to display the list of files that must be backed up within seven day"]
氮源
霍桑实验的主要研究结果（） ["工作条件和工作报酬不是影响工效的第一要素","劳动是一种群体活动，成人的世界主要是通过劳动形成的","工具人，会说话的工具","自我实现的人"]
在保护接零的中性线，必须（）。 ["一点接地","多点接地","不接地"]
A型行为模式
