A.flexibleB.reliableC.easyD.simple
A.flexible
B.reliable
C.easy
D.simple
A.flexible
B.reliable
C.easy
D.simple
A.flexible
B.terrible
C.reasonable
D.serious
A.Flexible working hours.
B.Being with students.
C.Quite high salary.
D.Good social status.
A、withdraw , checkBalance
B、withdraw , checkBalance, log
C、withdraw , checkBalance, acknowlege
D、withdraw , checkBalance, log, acknowledge
A、classifies budget requests by activity and estimates the benefits arising from each activity.
B、presents a statement of expectations for a period of time but does not present a firm commitment.
C、presents the plan for only one level of activity and does not adjust to changes in the level of activity.
D、presents the plan for a range of activity so that the plan can be adjusted for changes in activity levels.
A、Students are not spoiled by privileges.
B、Students have to take part-time jobs.
C、Students are more international.
D、Students are ill-treated.
One of the difficulties in building an SQL-like query language for the Web is the absence of a database(131)for this huge, heterogeneous repository of information. However, if we are interested in HTML documents only, we can construct a virtual schema from the implicit structure of these files. Thus, at the highest level of(132), every such document is identified by its Uniform. Resource Locator(URL), and a(133)and a text. Also, Web severs provide some additional information such as the type, length, and the last modification date of a document. So for data mining purposes, we can consider the set of all HTML documents as a relation:Document(url, rifle, text, type, length, modif)Where all the(134)are character strings. In this framework, an individual document is identified with a(135)in this relation. Of course, if some optional information is missing from the HTML document, the associate fields will be left blank, but this is not uncommon in any database.
A.schema
B.platform
C.module
D.relation
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