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请按顺序简要说明影片放映前的准备工作内容,()、()、()、装片及开机检查。

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地下水动态观测要求,在观测水温时,温度计沉入水中时间,一般不应少于()分钟。

监控系统需要监测的模拟量包括电压,为保证安全,电压信号线上必须串接()引出。

在个体与环境的相互作用中,通过一定的程序和方法将获得的外部信息进行内部重组,以不断建构本身的知识布局、智能布局等综合素质的学习方式是()。

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?()

A. Recovery Manager
B. Recovery Window
C. Recovery Wizard
D. Enterprise Manager Home Page

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