根据劳动市场上失业的原因,经济学家将失业归纳为()。
A.自愿性失业
B.非自愿性失业
C.摩擦性失业
D.结构型失业
E.周期性失业
参考答案:C, D, E
已知连续函数f(x)满足条件
,求f(x).
—I'll be away on holiday. Would you mind looking after my parrot?
—Not at all. ________. [ ]
A. I've no time
B. I'd rather not
C. You can leave
D. I'd be glad to