在并汽操作过程中，应控制启动炉汽压比母管压力（），汽温比母管汽温低（）。
Which three functions are performed by the SQL Tuning Advisor?（） (Choose three.) Building the SQL profile。 Recommending optimization of materialized views。 Checking query objects for missing and stale statistics。 Recommending bitmap, function-based, and B-tree indexes。 Recommending restructuring SQL queries that are using bad pla。
某足球运动员，25岁，在激烈的足球比赛过程中突然倒在绿茵场上，裁判轻摇并呼唤该运动员，不见其反应，触颈动脉无搏动。此时第一步首先做（） 心脏按压。 口对口人工呼吸。 保持气道通畅。 简易人工呼吸器使用。 电除颤。
You are working as a Database Administrator. You erroneously dropped an important table named WAREHOUSE_DETAILS. The table resides in a non-SYSTEM tablespace. The following dependent objects have been defined on the dropped table： Due to limited space， some of the indexes and triggers have been removed from the Recycle Bin. You decide to recover the table by using Flashback Drop. You execute the following statement： SQL>FLASHBACK TABLE warehouse_details TO BEFORE DROP； What will be the implication of executing this statement？（） Only the WAREHOUSE_DETAILS table is recovered， and none of the dependent objects are recovered.。 The WAREHOUSE_DETAILS table is recovered along with the NOT NULL constraints， primary key constraint， and the referential integrity constraints.。 The WAREHOUSE_DETAILS table is recovered along with all the dependent objects except the indexes and triggers previously removed from the Recycle Bin.。 The WAREHOUSE_DETAILS table is recovered along with all the dependent objects except the referential integrity constraints and the indexes and triggers previously removed from the Recycle Bin.。
下列不属于压力控制回路是（）。 换向和闭锁回路。 调压和卸载回路。 节流调速主速度换接回路。 顺序动作回路。
Through which action are Currency Codes created？ （）
