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
It can be inferred from the passage that both Apple and IBM try to gain a competitive advantage by ______.
A．copying each other's technology
B．incorporating features that make their products distinctive
C．making their computers more expensive
D．making their computers run much faster
单项选择题
By saying that in too many academic fields, the work has no context (Para. 1) the author means that the teaching in these areas ______.
A．ignores the actual situation
B．is not based on the right perspective
C．0nly focuses on an integrated core of common learning
D．gives priority to the cultivation of a global vision among students
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