GIS工程的概念
You want to create the Recovery Manager （RMAN） Virtual Private Catalog （VPC） to maintain a separation of responsibilities along with a consolidation of RMAN repository. Which condition must be met before you create the VPC？（） A base catalog exists。 The recovery catalog is empty。 The base recovery catalog must be dropped。 A target database is registered in the recovery catalog。
为保证桥头路堤稳定，台背填土除设计文件另有规定外，一般应用（）或其他渗水性土填筑。 砾石。 粘性土。 砂性土。 混凝土。
以下哪些技术属于个别心理辅导技术？（） 倾听技术。 澄清技术。 共情技术。 具体化技术。
An important tablespace of your database is dropped by mistake. You use the Flashback Database feature to retrieve the tablespace. You perform the following steps to retrieve the tablespace： 1. You log on to Enterprise Manager as SYSDBA. 2. You select the maintenance screen. 3. You choose Perform Recovery option on the maintenance screen. 4. You choose Whole Database in the Object Type drop-down list Perform Recovery： Type screen. 5. You choose Recover to Current Time from the Operation Type on the Perform Recovery： Type screen. 6. You provide the Host Credentials for a database user. on the Perform Recovery： Type screen. 7. You click the continue button. An information screen appears saying that the database is unavailable. What is this information screen？（） Recovery Manager。 Recovery Window。 Recovery Wizard。 Enterprise Manager Home Page。
没有一个固定的信息中心，成员之间总是互相传递信息的是（）
