提出重建礼教最早始于（）。 ["孔子","司马昭","朱熹","辜鸿铭"]
含强腐蚀性气体组分（）的混合气体，称为腐蚀性混合气。 ["不论浓度大小","0.1%以上","0.5%以上","2%以上"]
You execute the following RMAN command in the order shown below： BACKUP VALIDATE DATABASE； BLOCKRECOVER CORRUPTION LIST； What will these commands do？（） [" Create a backup of the database and recover all corrupted blocks found in the backup."," Run a backup validation and list all the logically corrupt blocks as well as physically corrupt blocks in the database."," Run a backup validation to populate V$COPY_CORRUPTION view， and then list any corrupt blocks recorded in the view."," Run a backup validation to populate V$DATABASE_BLOCK_CORRUPTION view， and then repair any corrupt blocks recorded in the view."," Run a backup validation， repair any corrupt blocks found during the validation process， and then update V$DATABASE_BLOCK_CORRUPTION view to indicate which corrupt blocks have been repaired."]
Evaluate the following function code： CREATE FUNCTION get_dept_avg（dept_id NUMBER） RETURN NUMBER RESULT_CACHE RELIES_ON （EMPLOYEES） IS avgsal NUMBER（6）； BEGIN SELECT AVG（SALARY）INTO avgsal FROM EMPLOYEES WHERE DEPARTMENT_ID = dept_id； RETURN avgsal； END get_dept_avg； Which statement is true regarding the above function？（） [" The cached result becomes invalid when any structural change is done to the EMPLOYEES table. "," If the function execution results in an unhandled exception，the exception result is also stored in the cache."," Each time the function is invoked in a different session，the current result in the result cache gets overwritten."," If the function is invoked with a different parameter value，the existing result in the result cache gets overwritten by the latest value."]
螺栓穿入方向应一致朝外且合理，螺栓拧紧后外露丝扣不小于（）扣。 ["1~2","2~3","3~4","4~5"]
什么是正点行车？影响正点行车的因素有哪些？如何保证正点行车？
