对肾母细胞瘤的描述，下列哪项是错误的（） 绝大多数发生于小儿，2-4岁最多见。 据统计95.6%发生于一侧肾脏。 肿瘤主要侵犯肾盂、肾盏，多出现血尿。 肿瘤一般为鸡蛋大到儿头大，圆形或椭圆形，有假包膜。 转移途径主要为淋巴和血行。
After the /etc/tunables/nextboot file has been edited, which command can be used to validate changes to the IO performance tuning settings?（） ioo -v nextboot。 ioo -c nextboot。 valcheck -f nextboot。 tuncheck -r -f nextboot。
Which of the following files should be edited so that tftpd is running with the -n option？（） etc/services。 /etc/inetd.conf。 /etc/tftpd.conf。 /etc/rc.net。
Examine the following command used to perform incremental level 0 backup: RMAN> BACKUP INCREMENTAL LEVEL 0 DATABASE; To enable the block change tracking, after the incremental level 0 backup you issued the following command: SQL> ALTER DATABASE ENABLE BLOCK CHANGE TRACKING USING FILE '/mydir/ rman_change_track.f'; To perform incremental level 1 cumulative backup, you issued the following command: RMAN> BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE; Which two statements are true in the above situation?（） The block change tracking data will be used only from the next incremental 0 backup.。 The incremental backup will use change tracking data for accomplishing the backup.。 The incremental backup will not use change tracking data for accomplishing the backup.。 The block track file will scan all the blocks and create bitmap for all the blocks backed up in the level 0 backup.。
A customer has 6.5 TB with 146 GB 15k disk drives on an IBM System Storage DS8700. They want to add 15 TB using 300 GB 15k disk drives. The customer is concerned about performance and wants to know if the DS8700 has the performance capability. What is the appropriate way to model the performance（） Disk Magic。 Capacity Magic。 test the workload at an IBM Benchmark Center。 test the solution with IBM Storage Performance Center。
当建筑物高度相同、面积相同时，耗热量比值最小的平面形式是（）。
