12 Which is the most accurate statement regarding central banks and monetarypolicy?A Central bank activities are typically intended to maintain price stability.B Monetary policies work through the economy via four independentchannels.C Commercial and inter-bank interest rates move inversely to official interestrates.B选项是哪4个渠道？基础课老师好像没有展开讲

视频这里老师把A选项讲反了吧，不是名义利率的变化只影响通胀率，而是名义利率的变化只能是来源于通胀率的变化 另外，为什么费雪假设真实利率是相对稳定的？

4 According to the theory of money neutrality, money supply growth does not affect variables such as real output and employment in A the long run. B the short run. C the long and short run. 为什么货币在长期不影响产出？货币在短期怎样影响产出？

货币主义认为什么导致经济周期？是外部冲击和政府干预（主要是货币供应量改变）导致呢？还是只有政府干预导致？

商业周期中，对于“库存/销售”指标的变化几个问题？ 1）在刚开始复苏阶段，为什么库存/销售指标开始上升？ 2）在扩张阶段，库存和销售都开始增长，所以指标比较稳定，对吗？ 3）在放缓阶段，销售是下降的，库存这个阶段是上升的吗？ 4）在衰退阶段，库存/销售指标是怎么变化？

9 In a recession, companies are most likely to adjust their stock of physical capital by: A selling it at fire sale prices B not maintaining equipment. C quickly canceling orders for new construction equipment. 1）recession是四个阶段里的slowdown还是contraction?为什么有不一样的表述？ 2）关于取消订单，基础课老师讲contraction阶段新订单取消，这里是客户取消订单还是厂商自己取消订单？ 3）recession阶段，为什么厂商不立即取消订单？

3 An economic peak is most closely associated with: A accelerating inflation B stable unemployment. C declining capital spending. B选项，经济顶峰的时候失业率是稳定的吗？

An economic forecasting firm has estimated the following equation from historicaldata based on the neoclassical growth model:Potential output growth = 1.5 + 0.72 × Growth of labor + 0.28 × Growth of capital31 The coefficient on the growth rate of labor (0.72) in this equation best interpreted as:A the labor force participation rate.B the marginal productivity of labor.C the share of income earned by labor.C选项什么叫能被劳动力解释的部分？是劳动力可以赚得的income吗？资本增长率前面的系数怎么解释，是总的GDP中投入的资本数吗？是GDP公式中的I吗？

为什么AD-AS曲线横坐标是real GDP？老师上课时讲了结论没讲原因

22 Increased household wealth will most likely cause an increase in: A household saving. B investment expenditures. C consumption expenditures. 这一题为什么不选B？如果按照解释总需求曲线为什么往下的wealth effect会导致投资增加，那应该选B啊，这个题目中的wealth effect和总需求影响因素的wealth effect不是同一个吗？