[多选] 关于施工成本目标控制的原则，正确的有（）。

对流动资产评估无需考虑功能性贬值时因为（）。 周转速度快。 变现能力强。 形态多样化。 库存数量少。 获利能力强。 When you create a backup control file， where is the resulting file written to？（）    The database user dump destination directory。  The database diagnostic destination directory。  To $ORACLE_HOME/rdbms。  To $ORACLE_HOME/admin。  To the directory and filename you specify in the command。 出芽生殖 策略性行为 Consider the query: Mysql＞ SET @run = 15; Mysql＞ EXPLAIN SELECT objective, stage, COUNT (stage) FROM iteminformation WHERE run=@run AND objective=’7.1’ GROUP BY objective,stage ORDER BY stage; The iteminformation table has the following indexes; Mysql＞ SHOW INDEXES FROM iteminformation: This query is run several times in an application with different values in the WHERE clause in a growing data set. What is the primary improvement that can be made for this scenario?（） Do not pass a user variable in the WHERE clause because it limits the ability of the optimizer to use indexes。 Add an index on the objective column so that is can be used in both the WHERE and GROUP BY operations。 Drop the run_2 index because it has caused a conflict in the choice of key for this query。 Execute the run_2 index because it has caused a conflict in the choice of key for this query。 Add a composite index on (run,objective,stage) to allow the query to fully utilize an index。 关于施工成本目标控制的原则，正确的有（）。