[单项选择]Recent reform efforts (have been focused) on encouraging lifelong or recurrent education to meet (changing individual and social need). Thus, not only (the number of students has increased), (but) the scope of education has also expanded
A. have been focused
B. changing individual and social need
C. the number of students has increased
D. but

[填空题]Recent reform efforts (have been focused) on encouraging lifelong or recurrent education to meet changing (individual and social needs). Thus, not only (the number of students has increased), (but) the scope of education has also expanded.

• A. have been focused
• B. individual and social needs
• C. the number of students has increased
• D. but

[简答题]A string of recent Trojan horses have been designed to ______ and install programs that can be used to remotely control infected machines.

[简答题]Early data warehousing efforts focused on separating the decision-support environment from operational transaction-processing systems. The ultimate goal was to create a centralized source of data for accurate, consistent reporting. The greatest cost of implementing data warehouses comes from the process of extracting, transforming and integrating data from source systems.

[简答题]

In recent years, railroads have been combining with each other, merging into super system, causing heightened concerns about monopoly. As recently as 1995, the top four railroads accounted for fewer than 70% of the total ton miles moved by rails. Next year, after a series of mergers is completed, just four railroads will control well over 90% of all the freight moved by major rail carriers.
Supporters of the new super systems argue that these mergers will allow for substantial cost reductions and better coordinated service. Any threat of monopoly, they argue, is removed by fierce competition from trucks. 61) But many shippers complain that for heavy bulk commodities traveling long distances, such as coal, chemicals, and grain, trucking is too costly and the railroads therefore have them by the throat.
The vast consolidation within the rail industry means that most shippers are served by only one Rail Company. Railroads typically charge such "captive&qu