下垂式插花具有天然活泼、飞动的表现效果。
You want to migrate your database to ASM， so you have done a clean shutdown， made a closed backup of the entire You wa database， noted the location of your control files and online redo log files， and changed your spfile to use OMF. The last step is to run an RMAN script to do the conversion. Using the following steps，what is the correct order in which the following RMAN commands should be executed？（） 1. STARTUP NOMOUNT 2. ALTER DATABASE OPEN RESETLOGS 3. SQL "ALTER DATABASE RENAME ，，logfile1 path TO ，，+dgrp4 ，，" # plus all other logfiles 4. SWITCH DATABASE TO COPY 5. BACKUP AS COPY DATABASE FORMAT ，，+dgrp4 6. ALTER DATABASE MOUNT 7. RESTORE CONTROLFILE FROM ，，controlfile_location 2， 5， 3， 1， 7， 6， 4。 1， 7， 6， 5， 4， 3， 2。 5， 1， 2， 7， 4， 6， 3。 7， 3， 1， 5， 6， 2， 4。
RO保安过滤器的额定出力（）m3/h 70。 72。 180。
下列属于宏观市场环境的有（）。 人口环境。 经济环境。 顾客。 社会人文环境。 中介单位。
When tuning a network module what is the purpose of the grace period？（） It defines the maximum permissible time period between missed heartbeats before a failure is detected。 It defines the time period to wait to activate the network module after starting the cluster manager。 It defines the period between detecting a missed heartbeat and initiating a network down， allowing thenetwork to stabilize。 It defines the time period during which， after a network failure was detected， further network failures of thesame type will be ignored。
引起原发性血小板增多症血栓形成的原因，下列哪项是最重要的（）
