NO.PZ2017100901000019
问题如下:
A decrease in the unemployment rate is most likely caused by:
选项:
A.an decrease in population.
B.an increase in unemployed workers.
C.a decrease in unemployed persons.
解释:
C is correct.
考点:Unemployment
解析:
讨论失业率时,我们考虑的劳动力,而非总人口,所以A选项不入选。
失业人口下降,上式中分子下降,失业率降低,故C选项入选,B选项不入选。
B和C有什么区别?一个是worker,一个是person