Consider the following statement： SQL> EXECUTE DBMS_STATS.GATHER_SHEMA_STATS （- 2> ownname => ‘OE’， - 3> estimate_percent => DBMS_STATS.AUTO_SAMPLE_SIZE， - 4> method opt => ‘for all columns size AUTO’）； What is the effect of ‘for all columns size AUTO’ of the METHOD_OPT option？（） ["The Oracle server creates a new histogram based on existing histogram definitions for all table, column, and index statistics for the OE schema. ","The Oracle server creates a histogram based on data distribution regardless of how the application uses the column\/s for all table, column, and index statistics for the OE schema.","The Oracle server creates a histogram based on data and application usage of the column\/s for all table, column, and index statistics for the OE schema. ","The Oracle server creates a histogram based on application usage, regardless of data distribution, for all table, column, and index statistics for the OE schema."]
随着社保体制的改革，社保体系建设资金的来源是（）。 ["单一的","多元化的","完全依靠税收","不明确"]
下列哪一项不是冷却系统的作用？（）。 ["从发动机带走多余的热量","保持发动机温度尽可能低","使发动机尽快达到工作温度","保护发动机内部零件不过热"]
为什么说过渡时期总路线是中国社会由新民主主义向社会主义转变的历史必然？
某精神分裂症患者经常有藏药或拒服药行为，护理人员应该（） ["把患者保护性约束起来","服药前仔细检查患者口腔、舌下等","服药后注意观察患者是否吐药","发药前做好解释工作"]
社会变革会对人们的心理健康产生哪些消极影响？
