Which two operations can be performed on an external table（） Create a view on the table.。 Create an index on the table.。 Create a synonym on the table.。 Add a virtual column to the table.。 Update the table using the UPDATE statement.。 Delete rows in the table using the DELETE command。
小章和小胡是中学的同班同学，又来自相邻的山村，还属表亲。高中毕业那年，两人几乎以同样优秀的成绩考进了同一所本科院校。进大学以后，小章的学业成绩仍然优秀，小胡在大一时却出现了多门不及格，在留级线上挣扎的现象。你认为，在小章与小胡之间出现这种显著差异的主要原因是（）。 学习动机。 学习习惯。 学习方法。 学习需要。
A customer wants to configure two resource groups and create the following shared filesystem structure：Resource GroupFilsystem Mount Point Rg1/app1 Rg2/app1/data Which of the following will ensure the proper mount order for these filesystems？（） Set filesystem recovery method to parallel。 Set filesystem recovery method to sequential。 Set filesystem recovery method to parallel and configure a parent/child relationship for the resourcegroups。 Set filesystem recovery method to sequential and configure a parent/child relationship for the resourcegrou。
An IBM XIV system with nine modules and 2 TB disks is being proposed to a customer who needs to increase disk capacity in the data center. The customer is concerned about data growth andcost after the initial purchase. Which of the following factors of the solution should be stressed to the customer to address data growth?（） the XIV system can be scaled by the addition of modules。 XIV offers thin provisioning for all available host operating systems。 reduced operating costs will pay for another XIV system in less than two years。 the management GUI allows the administrator tovirtualize the entire storage system quickly。
车辆正常运行中，当转向架一侧空气弹簧爆破时，不受影响的是（）。 另一侧空气弹簧。 总风缸。 副风缸。 总风管。
断电保护装置是由（）组成的。
