You observe that the senior database administrator always uses the following command when connecting to Recovery Manager （RMAN）， and then starts executing commands to backup the database files： % rman target / What would be the effect of this command？（） RMAN would use the current operating system location to place the backup.。 RMAN would use the control file of the target database to maintain the backup.。 RMAN would use the recovery catalog of the target database to maintain the backup.。 RMAN would use the control file of the target database to maintain the backup metadata.。 RMAN would use the recovery catalog of the target database to maintain the backup metadata.。
雷击：雷云对大地及地面物体的（）现象。 吸电。 放电。 触电。
You created a custom menu for the Order Entry application. The shipping administrator has requested an additional submenu containing four items to invoke various reports. Which command type must you use to identify the parent menu item as a submenu? （） Menu 。 Plus 。 Macro。 PL/SQL。
按钮组件和编辑框组件能够响应的事件有些是相同的。
不能燃烧的低压液化气体共有（）种。 5。 6。 17。 25。
折叠封堵头顶端到中心点的距离约等于（）
