顾客评价产品和服务的依据主要有（） ["搜寻特性","评价特性","经验特性","了解特性","信任特性"]
Which two statements are true about WHERE and HAVING clauses? （） ["A WHERE clause can be used to restrict both rows and groups.","A WHERE clause can be used to restrict rows only.","A HAVING clause can be used to restrict both rows and groups.","A HAVING clause can be used to restrict groups only.","A WHERE clause CANNOT be used in a query if the query uses a HAVING clause.","A HAVING clause CANNOT be used in subqueries."]
大黄中具有泻下的成分为（） ["蒽醌苷类","游离蒽醌类","黄酮苷类","游离香豆素类"]
You have used the CROSSCHECK BACKUP command to verify that the backups recorded in the RMAN repository actually exist. Which command should you now use to check if any of the files were missing？（） ["LIST EXPIRED","DELETE EXPIRED","DELETE OBSOLETE","CHANGE UNCATALOG"]
利用有机溶剂加热提取中药成分时，一般选用（） ["煎煮法","浸渍法","渗漉法","回流法"]
影响客户终生价值通常有哪些因素？
