单项选择题

Small population may mean ______.

A．higher productlvity, but a lower average income
B．lower productivity, but a higher average income
C．lower productivity and a lower average income
D．higher productivity and a higher average income

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热门试题

单项选择题

It is no easy job to carry out a general plan for birth control throughout the world because ______.

A．there are too many underdeveloped countries in the world
B．underdeveloped countries have low level of industrial development
C．different governments have different views of the question
D．even developed countries have complex problems

单项选择题

In a developed country, people will perhaps go out of work if the birthrate ______.

A．goes up
B．goes down
C．remains stable
D．is out of control