You executed this command to create a password file: $ orapwd file = orapworcl entries = 10 ignorecase = N Which two statements are true about the password file?（） It will permit the use of uppercase passwords for database users who have been granted the SYSOPER role.。 It contains username and passwords of database users who are members of the OSOPER operating system group.。 It contains usernames and passwords of database users who are members of the OSDBA operating system group.。 It will permit the use of lowercase passwords for database users who have granted the SYSDBA role.。 It will not permit the use of mixed case passwords for the database users who have been granted the SYSDBA role.。
教育社会学的演变主要经过哪几个阶段（）。 规范性时代。 证验性时代。 解释的新教育社会学时代。 成熟时代。
外国人在中国境内就业的，参照《社会保险法》规定参加社会保险。
空载特性曲线是发电机基本特性曲线之一，用它可以求发电机的（） 电压变化率。 励磁绕组是否有杂间短路。 未饱和的同步电抗。 功率因数。
You are using flat files as the data source for one of your data warehousing applications. You plan to move the data from the flat file structures to an Oracle database to optimize the application performance. In your database you have clustered tables. While migrating the data， you want to have minimal impact on the database performance and optimize the data load operation. Which method would you use to load data into Oracle database？（） use the external table population。 use the Oracle Data Pump export and import utility。 use the conventional path data load of SQL*Loader utility。 use the direct path data load of Oracle export and import utility。
向污水中注入空气，使污水中的乳化油或细小固体颗粒附在空气泡上，随气泡一起上浮到水面，从而除去污水中的油珠属于（）含油污水处理法
