单项选择题

Which of the following is not mentioned as a necessary part to maintain America's scientific leadership

A．Money.
B．Combination of various disciplines.
C．Joint efforts of the most intelligent scientists.
D．Favorable academic atmosphere.
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单项选择题
The example given in the third paragraph is mainly used to show ______.
A．western Europe is spending more money than America in certain fields
B．Europeans are making more discoveries than Americans in retain fields
C．European scientists are more intelligent than American scientists
D．America's scientific leadership is being replaced by European countries
单项选择题
According to the passage, in the competition for scientific leadership,______.
A．applied research is of the greatest significance
B．basic research is of the greatest significance
C．research in high-energy physics is of the greatest significance
D．research in high-tech fields is of the greatest significance
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