Which tuning tool recommends how to optimize materialized views so that these views can take advantage of the general query rewrite feature?（）
A、Segment Advisor
B、SQL Access Advisor
C、Undo Advisor
D、SQL Tuning Advisor
为了对有序表进行二分查找，则要求有序表（ ）。
A、只能顺序存储
B、只能链式存储
C、可以顺序存储也可以链式存储
D、任何存储方式
以下说法正确的是（）。
A、所有交换机的光纤端口都是2个
B、采用光纤端口级联时，光纤跳线必须是2根
C、当光纤端口连接成功后，LED指示灯为红色
D、采用光纤端口级联时，光纤跳线只需要1根
流行性出血热病程中各期发展过程为（）
A、发热期、低血压休克期、多尿期、少尿期、恢复期
B、发热期、多尿期、低血压休克期、少尿期、恢复期
C、发热期、低血压休克期、少尿期、多尿期、恢复期
D、发热期、出血期、少尿期、多尿期、恢复期
E、发热期、中毒期、低血压休克期、少尿期、恢复期
A bank has requested proposals for a storage solution to upgrade their disaster recovery processes for their IBM System z， UNIX， and Microsoft Windows environment. The solution must simulate a multi-site environment and provide the customer the ability to evaluate Metro Mirror， Global Mirror， Global Mirror for z/OS， and FlashCopy. Floor space is limited. Which solution best meets the specified requirements（）
A、two IBM System Storage DS8100 systems
B、one IBM System Storage DS8300 with LPAR
C、two IBM System Storage DS6800 systems in a single rack
D、one IBM System Storage DS6800
微型计算机中的主存储器是（）。