穆旦诗歌艺术的创新，主要体现在哪几个方面？
在生产过程中调节器比例调节作用有以下规律比例度降低调节作用（） ["增强","减弱","不变"]
View the Exhibit and examine the attributes of an undo tablespace. In an OLTP system, the user SCOTT has started a query on a large table in the peak transactional hourthat performs bulk inserts. The query runs for more than 15 minutes and then SCOTT receives thefollowing error: ORA-01555: snapshot too old What could be the reason for this error（） ["The query is unable to get a read-consistent image.","There is not enough space in Flash Recovery Area.","There is not enough free space in the flashback archive.","The query is unable to place data blocks in undo tablespace"]
机电传动系统稳定工作时，如果TM=TL，电动机旋转方向与TM相同，转速将产生的变化是（）。 ["减速","加速","匀速","停止"]
You work as a database administrator for Certkiller .com. Users complain that their query is taking a long time to complete. You suspect the database buffer cache size to be the reason， and you define an alert to be generated when the buffer cache hit metric goes below 85%. When you observe the dynamic performance views， you find that the buffer cache hit ratio is 81% but no alerts are being generated. What could be the reason for this problem？（） ["The advisory memory has been turned off.","The DB_CACHE_ADVICE parameter has been set to OFF in the parameter file.","The STATISTICS_LEVEL parameter has been set to BASIC in the parameter file.","The TIMED_STATISTICS parameter has been set to FALSE in the parameter file.","The STATISTICS_LEVEL parameter has been set to TYPICAL in the parameter file."]
简述地价的特征有哪些？
