[多选] You work as a database administrator for Supportcenter.cn. Your database is opened inNOARCHIVEKLOG mode. You decide to place the database in ARCHIVELOG mode. How would you do this？（）

View the Exhibit exhibit1 to examine the series of SQL commands. View the Exhibit exhibit2 to examine the plans available in the SQL plan baseline. The baseline in the first row of the Exhibit is created when OPTIMIZER_MODE was set to FIRST_ROWS. Which statement is true if the SQL query in exhibit1 is executed again when the valueof OPTIMIZER_MODE is set to FIRST_ROWS?（） The optimizer uses a new plan because none of the plans in the exhibit2 are fixed plans.。 The optimizer uses the plan in the second row of the exhibit2 because it is an accepted plan.。 The optimizer uses the plan in the first row of the exhibit2 because it is the latest generated plan.。 The optimizer uses the plan in the first row of the exhibit2 because OPTIMIZER_MODE was set to FIRST_ROW during its creation.。 女性，28岁。右下肢被火车压伤后4d，尿量24h小于100ml，伴有恶心、呕吐、嗜睡、昏迷、抽搐等症状。化验血肌酐460umol/L，尿素氮26mmol/L。患者的血液中哪项变化是不可能的（） 高钾血症。 高钠血症。 高磷血症。 高镁血症。 低钙血症。 为什么要研究课堂观察诊断技术。 The system hangs at boot time after starting NFS services. What is the most likely cause？（）  The action parameter of rcnfs in /etc/inittab is ’off’ and the script called is not exiting.。 The action parameter of rcnfs in /etc/inittab is ’wait’ and the script called is not exiting.。 The action parameter of rcnfs in /etc/inittab is ’once’ and the script called is not exiting.。 The action parameter of rcnfs in /etc/inittab is ’respawn’ and the script called is not exiting。 建筑物评估中的公共配套设施建设费包括（）等建设费用。 临时用电。 附属锅炉房。 自行车棚。 大型游乐场。 You work as a database administrator for Supportcenter.cn. Your database is opened inNOARCHIVEKLOG mode. You decide to place the database in ARCHIVELOG mode. How would you do this？（）