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According to the passage , distance learning is ba


By almost any measure , there is a boom in Internet-based instruction . In just a few years , 34 percent of American universities have begun offering some form of distance learning (DL), and among the larger schools , it’s closer to 90 percent . If you doubt the popularity of the trend, you probably haven’t. It enrolls 90,000 student, a statistic used to support its claim to be the largest private university in the country.

While the kinds of instruction offered in these programs will differ, DL usually signifies a course in which the instructions post syllabi(课程大纲), reading assignments , and schedules on Websites , and students send in their assignments by e-mail . Generally speaking, face-to-face communication with an instructor is minimized or eliminated altogether.

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) t the casual relationship between students and professors

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