题目内容

公共场所消防安全工作贯彻()的方针,实行消防安全责任制和岗位消防安全责任制。

A. 安全第一、预防为主
B. 预防为主、防消结合
C. 预防为主、综合治理
D. 安全第一、防消结合

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You are performing flashback of the ORDERS table in the Scott’s schema because some important data is deleted in the table by mistake. The SCN number was 771513 at the time of deletion. You issued the following statement to perform Flashback Table: SQL> FLASHBACK TABLE ORDERS TO SCN 771513; What is the prerequisite to perform Flashback Table?()

A. You must configure OMF in your database.
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B. 缓燃期内缸内温度上升到最高循环温度
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