单项选择题

The development of modern communications technology in developing countries may ______.

A．hinder their industrial production
B．cause them to lose control of their trade
C．force them to reduce their share of exports
D．cost them their economic independence
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单项选择题
The main idea of this passage is that ______.
A．man's elementary number sense is found in lower species
B．birds have a limited number sense
C．animals cannot count
D．number sense is a primitive form of counting
单项选择题
It can be inferred from the passage that ______.
A．international trade should be expanded
B．the interests of the poor countries have not been given enough consideration
C．the exports of the poor countries should be increased
D．communications technology in the developing countries should be modernized
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