溶解乙炔气瓶：瓶内（），用于充装乙炔的气瓶。 装有多孔填料及溶剂。 什么也没有。 实心。
The database instance is currently using SPFILE. View the Exhibit and examine the error that youreceived while running the DB Structure Integrity check. Given below are the steps to recover from the error in random order: 1: Shut down the instance, if not already done. 2: Copy one of the remaining control files to a new location. 3: Change the value of the CONTROL_FILES initialization parameter to correspond to the new location of the control files. 4: Start up the database instance to the NOMOUNT stage. 5: Recover the database to the point of failure of the control file. 6: Open the database. Identify the correct sequence of steps() 1，2，4，3，5，6。 2，4，3，5，6；1 not required。 4，5，6，2，3；1 not required。 5，2，3，4；1 and 6 not required。
玻璃形成的动力学条件
下列情况中，不属于特别重大质量事故的是（）。 一次死亡30人以上。 严重影响使用功能或工程结构安全，存在重大质量隐患的。 直接经济损失达500万元及其以上的。 由于质量事故，造成人员死亡或重伤3人以上。
You decided to change the location of the flash recovery area. You executed the following command： ALTER SYSTEM SET DB_RECOVERY_FILE_DEST=’+disk1’ SCOPE=BOTH SID=’*’； Which statement is true？（） The location can be changed only if the flash recovery area is empty.。 After executing the command， all new flash recovery area files will be created in the new location.。 The command will generate an error because you cannot change the flash recovery area while the database is open.。 All the existing files in the flash recovery area will be moved to the new location and all new Flash Recovery Area files will be created in the new location.。
You established access to menu modules using roles. You have allowed the sales role to access the menu module, but prevented access to the Update menu item. Which item property would you alter to gray out the menu option for the role?（）
