单项选择题

Apple sells its new computer models at a high price because ______.

A．they have new features and functions
B．they are more sophisticated than other models
C．they have new accessories attached
D．it wants to accumulate funds for future research
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单项选择题
By saying that in too many academic fields, the work has no context (Par
A．l) the author means that the teaching in these areas ______.A. ignores the actual situationB. is not based on the right perspectiveC. only focuses on an integrated core of common learningD. gives priority to the cultivation of a global vision among students
单项选择题
American colleges and universities failed to graduate half of their four year degree candidates because ______.
A．most of them lack high-quality faculties
B．the interests of most faculty members lie in research
C．there are not enough incentives for students to study hard
D．they attach greater importance to research and publication than to teaching
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