单项选择题

What is found to have close relationship with rapid increase in population

A．War between 2 countries.
B．Ways discovered to increase productivity.
C．Migration from a continent to another continent.
D．A new religion beginning to be accepted by people.

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热门试题

单项选择题

How many significant demographic changes ever occurred in the past one million years

A．One.
B．Two.
C．Three.
D．None.

单项选择题

The purpose of this selection is to______.

A．describe the superiority of the developed nations
B．stress the need for scientific and educational development
C．prove that underdeveloped nations are backward
D．show the poverty and ignorance of Third World countries