A. more people are retiring than people entering the workforce B. the birth rate is growing C. there is an oversupply of workforce D. young people outnumber old people 参考答案:A 答案解析:[解析] 根据文意可知选A。
第20题: [单项选择]青蒿鳖甲汤的功用是（） A. 养阴透热 B. 清燥润肺 C. 泻火解毒 D. 养阴清肺 E. 增液润燥 参考答案:A
第23题: [单项选择]Passage Two Questions 29 to 31 are based on the passage you have just heard. A. Old people. B. Teenagers. C. Infants. D. Adults. 参考答案:C 答案解析:[听力原文] Which group of people is identified by the research as the most cold-ridden group 第24题:[单选题]筛孔坚固，孔径不易变动，多用作粉碎机械的筛板的是 A.金属筛 B.编织筛 C.农业筛 D.冲眼筛 E.工业筛 参考答案:D 冲眼筛：系在金属板上冲压出圆形的筛孔而制成。其筛孔坚固，孔径不易变动，但孔径不能太细，多用作粉碎机械的筛板
