单项选择题

The author feels that the number sense displayed by Genus Eumenus is ______.

A．more remarkable than that of a crow
B．less convincing an instance than that displayed by the crow
C．actually not an instance of what the author is discussing
D．restricted to the female of this species
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单项选择题
Counting is different from number sense in that counting is ______.
A．dependent on simpler mental activity
B．a kind of ability possessed by man
C．found in animals as well as man
D．the ability to distinguish differences in small sets of objects
单项选择题
Why does the author say that the electronic economy may have a destructive impact on developing countries
A．Because it enables the developed countries to control the international market.
B．Because it destroys the economic balance of the poor countries.
C．Because it violates the national boundaries of the poor countries.
D．Because it inhibits the industrial growth of developing countries.
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