Clearly, from the schools perspective, there s a lot of money to be saved. Although some of the more ambitious programs require new investments in servers and networks to support collaborative software, most DL courses can run on existing or minimally upgraded systems. The more students who enroll in a course but don t come to campus, the more school saves on keeping the lights on in the classrooms, paying doorkeepers, and maintaining parking lots. And, while there s evidence that instructors must work harder to run a DL course for a variety of reasons, they won t be paid any more, and might well be paid less.

　　57.What is the most striking feature of the University of Phoenix?

　　A) All its courses are offered online.

　　B) Its online courses are of the best quality.

　　C) It boasts the largest number of students on campus

　　D) Anyone taking its online courses is sure to get a degree.

　　58.According to the passage , distance learning is basically characterized by_____

　　A) a considerable flexibility in its academic requirements

　　B) the great diversity of students academic backgrounds

　　C) a minimum or total absence of face-to-face instruction

　　D) the casual relationship between students and professors

　　59.Many students take Internet -based courses mainly because they can_____

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