单项选择题



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单项选择题
In the period from 1979-1989, on average, how much longer, in years, could a 45-year old Black man with a family income in excess of $25,000 expect to live than a 45-year old Black man with a family income of less than $10,000
A．4
B．6
C．8
D．10
E． 12
单项选择题
Of people 20 years of age or older, approximately how many more males than females were unem-ployed in 1997
A．150,000
B．300,000
C．750,000
D．1,200,00
E． 2,600,000
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