单项选择题

The most important advances made by man come from ______.

A．technical applications
B．apparently useless information
C．the natural sciences
D．the study of philosophy
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单项选择题
It can be inferred from the passage that man' s need to know is chiefly important in that it ______.
A．allows the human race to progress technically
B．comprises both the physical and social sciences
C．demonstrates human adaptability
D．defines his essential humanity
单项选择题
In the author's opinion, ______.
A．both social and natural sciences are aimed at understanding only
B．both pure knowledge and its applications are equally essential to man
C．philosophy is totally independent of the sciences referred to in the text
D．the revolutionary results of pure science can hardly be imagined by Utopians
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