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音乐实践活动中没有音乐创作、音乐表演就不会有（）。

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房地产价格既有使用代价的价格，又有交换代价的租金。（）

A. 正确
B. 错误

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结合导演的工作职责，环节特征，谈谈导演二度创作的意义。

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简述判断意识障碍的标准。

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You can use Oracle Flashback to look at past activity in your database. What are two other characteristics of Oracle Flashback？（）

A. Oracle Flashback uses undo information to construct consistent data.
B. You can use a cursor opened while using an Oracle Flashback image to perform DML once you deactivate Oracle Flashback in your session.
C. You can only use Oracle Flashback view of the data if the required records are still in the online redo log files.
D. Oracle Flashback lists the DML that was executed during the period you identify when initiating your session.&e

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