单项选择题

A small population may mean ______.

A．higher productivity 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

The government of the developed countries may prefer to ______.

A．a stable population
B．a slowly-increasing population
C．a fast-increasing population
D．a declining population

单项选择题

A．confirmingB．controllingC．conceptingD．concerning

A．confirming
B．controlling
C．concepting
D．concerning