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

Which of the following is net true according to the passage

A．Human population expands at an exponential rate.
B．Population growth has shown fluctuation in demographic history.
C．Population growth can not be regarded as a social failure.
D．Increase in population is related to productivity.

单项选择题

According to this selection, the keys to social development and material progress are ______.

A．profits and power
B．land and natural resources
C．science and education
D．industry and technology