单选题 Which of the following types of unemployment is most likely caused by long-run changes that eliminate some jobs while generating others for which unemployed workers are not qualified?
A. Frictional.
B. Structural.
C. Cyclical.

【正确答案】 B

【答案解析】[解析] 摩擦性失业(frictional unemployment)是指有工作能力的人由于信息不充分等原因暂时没有找到合适的工作。结构性失业(structural unemployment)是指由于长期的经济结构调整而没有合适的技能导致失业。周期性失业(cyclical unemployment)是指有效需求不足而导致的失业。