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活性污泥系统和生物膜系统中的微生物群落有何不同？

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You want to create a new optimized database for your transactional production environment to be used by a financial application. While creating the database， you want the Oracle software to take care of all basic settings to optimize the database performance. Which method would you use to achieve this objective？（）

A. Use the CREATE DATABAS. command to create the database with Oracle-managed files.
B. Use the Database Configuration Assistant (DBCA) to create the database with Oracle-managed files.
C. Use Enterprise Manager to create a new database with the Online Transaction Processing (OLTP) option.
D. Use Database Configuration Assistant (DBCA) to create the database with Transaction Processing template.
E. Use the CREATE DATABAS. command to create the database with Automatic Storage Management (ASM) file system.

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下面（）选项不能为其设置动作。

A. 影片剪辑元件
B. 图形元件
C. 按钮元件
D. 关键帧

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简述企业战略与企业信息化战略的关系。

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PCB中对线路板图CAM输出说法正确的（）。

A. CAM输出有光绘输出、打印输出、绘图输出
B. 打印输出时图的大小比列有12种
CAM输出文件类型可分为8种，其中这个[NCDrill]类型不包涵在中

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