单项选择题

When a population is said to be aging,______.

A．more people are retiring than people entering the workforce
B．the birth rate is growing
C．there is an oversupply of workforce
D．young people outnumber old people

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热门试题

单项选择题

The factor which does NOT influence the size of the workforce is______.

A．the size of population
B．age distribution of the population
C．national economy
D．natural increase

单项选择题

The role of trees is to______.

A．loose soil
B．keep soil in position
C．harden soil
D．Both A and B