转轴与轴上零件之间须要用键予于联接。
You lost a data file that belongs to an index tablespace in your database， which operates in ARCHIVELOG mode. Loss of the data file resulted in increased response time on your queries. Which two options would you use to solve this problem？ （） Restore the lost data file from the backup， and then flash back the database.。 Restore the data file pertaining to index tablespace， and then recover the tablespace.。 Restore all the data files， and then perform an incomplete recovery to get the tablespace back.。 Restore all the data files， and then perform an incomplete recovery using the backup control file.。 Drop and re-create the index tablespace， and then re-create all of the indexes in that tablespace.。
利用悬浮杂质、原油和污水的比重差静止或流动状态下实现油、水、渣的自然分离，属于（）含油污水处理法 沉降法。 混凝法。 气浮法。
衡量产业结构是否合理的关键是（） A.产业间是否有大于各产业能力之和的整体能力 。 B.产业间是否均衡 。 C.产业间比例是否恰当 。 D.产业构成是否齐全。
You write a procedure that will be called from two level triggers and a database trigger. Where should you store this code? （） On the Oracle server. 。 Locally in each form module. 。 In an attached PL/SQL library 。 On your file network server.。
1988年授于“《今天》文学奖”的诗人是（）
