在制定行车计划是,若要求在一小时内发出11各车次,车辆的周转时间为70分钟,则最少需要投入()辆车辆; 11。 12。 13。 14。
A senior DBA asked you to execute the following command to improve performance: SQL> ALTER TABLE subscribe log STORAGE (BUFFER_POOL recycle); You checked the data in the SUBSCRIBE_LOG table and found that it is a large table containing one million rows. What could be a reason for this recommendation?() The keep pool is not configured.。 Automatic Workarea Management is not configured.。 Automatic Shared Memory Management is not enabled.。 The data blocks in the SUBSCRIBE_LOG table are rarely accessed.。 All the queries on the SUBSCRIBE_LOG table are rewritten to a materialized view。
中、小型往复式压缩机一般采用滑动轴承,大型往复式压缩机一般采用滚动轴承。
空调室外线缆必须采用()橡皮电缆,管线较长的应采用PVC管套护固定。 三相五线。 单相。 三相。
Which code, inserted at line 14, will allow this class to correctly serialize and deserialize?() s.defaultReadObject();。 this = s.defaultReadObject();。 y = s.readInt(); x = s.readInt();。 x = s.readInt(); y = s.readInt();。
下列哪一说法是正确的?()