物流目标优化的对象是指（） 正确。 错误。
All the database users are presently connected to the database instance and working. The HR user hasopened three database sessions and executed the following command in one of his sessions：SQL> UPDATE persons SET ccode=’U031’ WHERE ccode=’U029’； 123 rows updated.SQL> DELETE FROM persons WHERE exp=’Y’；3 rows deleted. The SYS user opens a new session after HR executed the above commands. Which sessions can see theeffect of the UPDATE and DELETE commands（） 正确。 错误。
Your company uses SQL Server 2005. You are implementing a series of views that are used in ad hoc queries. The views are used to enforce your companys security policy of abstracting data. Some of these views perform slowly. You create indexes on those views to increase performance, while still maintaining the companys security policy. One of the views returns the current date as one of the columns. The view returns the current date by using the GETDATE() function. This view does not allow you to create an index. You need to create an index on the view. Which two actions should you perform?（） 正确。 错误。
杆件的刚度是指杆件具有的（）的能力。 正确。 错误。
A customer has the following equipment installed in their data center： （1）an IBM BladeCenter H chassis （2）two power supplies （3）six HS22V blades （4）three Nortel 1/10 GB ESMs The retail customer purchased a new HX5 with MAX5. Which of the following must be added to install the HX5 with MAX5？（） 正确。 错误。
从时间的相对性来看，小型企业的概念是随着经济发展及社会变化而不断变化的。
