我国最早关于电子商务的立法是（） 《中华人民共和国电信条例》。 《计算机软件保护条例》。 《1999年的《合同法》。 《中华人民共和国签名法》。
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。
椎管内麻醉术前用阿托品的目的是（） 预防呕吐。 镇静。 减弱迷走神经反射。 减轻内脏牵拉痛。 减少胃肠道内腺体分泌。
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。
A customer feels they are over-provisioning their current storage environment and falling short onperformance requirements. Which IBM solution can best help this customer manage their multi-tiered disk environment more effectively?（）
