NO.PZ2017100901000020
问题如下：
During an economic recovery, a lagging unemployment rate is most likely attributable to:
选项：
A.businesses quickly rehiring workers.
B.new job seekers entering the labor force.
C.underemployed workers transitioning to higher-paying jobs.
解释：
B is correct.
In an economic recovery, new job seekers return to the labor force, and because they seldom find work immediately, their return may initially raise the unemployment rate.
考点：Unemployment
解析：因为在经济刚开始不景气的时候，企业主会通过减少工人工作小时数的方法调节生产，只有当经济进一步衰退时才会考虑裁员，所以B选项说法正确。
经济不景气的时候企业主无意培训新员工，工人也很难找到培训再就业的机会，所以A,C选项都错误。
ac不选明白，B的意思是招新工作的人加入到labor force里
我的问题是为什么会有new job seeker entering，recovery的时候经济变好，但老板还在裁员是吗？所以才有new job seeker entering labor force？是因为unemployment 是lag指标，所以实际recovery时候，老板还在裁员？所以更多的没工作的人进入labor？不太理解这块
