根据利率期限结构理论，利率曲线呈下降趋势，表面短期利率水平大于长期预期利率水平，那么请老师解释一下A、C错在哪里？

55 The Industry and Business Risk excerpt states that, “Increased competition may lead to lower unit sales and excess production capacity and excess inventory. is may result in a further downward price pressure.” The downward price pressure could lead to inventory that is valued above current market prices or net realisable value. Any write-downs of inventory are least likely to have a significant effect on the inventory valued using: A weighted average cost. B first- in, first-out (FIFO). C last-in, first-out (LIFO). 这一题不懂，1）B选项当价格下降的时候，FIFO下最不可能减值是因为FIFO下ending inventory反映的是最新的存货价格，所以不容易减值吗？2）原版书答案后半段是什么意思，为什么又说通常LIFO下不容易减值，是因为通常情况下存货成本是上升的吗？3）题目中说的downward price pressure是产品的价格还是存货的价格是下降的？

这个第七题不太理解。请老师讲解一下逻辑

total factor productivity在GDP的恒等式里指的是哪一部分？为什么不能被直接计量？

225-231的ppt没有讲解

54 Note 2 indicates that, “Inventories valued on the LIFO basis totaled¥94,578 million and ¥50,037 million at December 31, 2017 and 2018, respec-tively.” Based on this, the LIFO reserve should most likely:A increase.B decrease.C remain the same.为什么LIFO下存货下降说明LIFO reserve下降？

老师好 请问百题case1 第5题 statement 3不是很理解。“if Janice were to add a 10-yr period certain option to her annuity, her income yield would be reduced when compared to not having the option, but it would be reduced by greater amounts the longer she waits to purchase the annuity" 为什么income yield 会下降？为什么越晚降得越多。谢谢

老师，麻烦解释下官网题这个case的两道题

19页10题请老师讲下相对ppp公示？ 另是否这样理解，如果a国r下降，则inflation上升，a国货币贬值？

第一行是截距B0 第二行不是自变量x吗？还是默认是斜率？