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
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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
单项选择题
Which of the following statement is true according to the passage
A．35% of technical reports published in scientific journals are written by scientist's doing their research in America.
B．35 % of all scientific journals are issued by American scientific societies.
C．35% of all scientists come from America.
D．35 % of all scientists are doing research at American institutions.
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