NO.PZ2016010801000066
问题如下：
According to public data from government website, the consumer price index of Country X for the most recent four years are 105.9, 114.3, 120.0 and 123.4 consecutively. Based on the information, the inflation behavior of Country X is most likely:
选项：
A.hyperinflation.
B.disinflation.
C.deflation.
解释：
B is correct.
First, calculate the inflation rate for each year:
Year 2 (114.3 - 105.9) / 105.9=7.93%
Year 3 (120 - 114.3) / 114.3=4.99%
Year 4 (123.4 - 120) / 120=2.83%
The inflation rate is decreasing over the four years and remains positive, therefore the Country X is most likely in disinflation.
考点：disinflation.
解析：
首先，计算每年的通货膨胀率:
第2年(114.3 - 105.9)/ 105.9=7.93%
第3年(120 - 114.3)/ 114.3=4.99%
第4年(123.4 - 120)/ 120=2.83%
通货膨胀率在这四年中一直在下降并保持正值，因此X国很可能处于disinflation状态。
CPI不应该基于base year来计算吗
