NO.PZ2018062003000137
问题如下：
Which of the following statements is least likely to describe core inflation?
选项：
A.
core infaltion is used for all goods.
B.
it is useful to estimate the trend of the future price level.
C.
core infaltion does not include food and energy.
解释：
A is correct.
Core inflation excludes food and energy prices ,which is less volatile compared to CPI.
考点： core infaltion
解析： core infaltion 的计算剔除了食品以及能源价格，因此A选项入选，C选项不入选。
由于 core infaltion 的波动较小，所以适合用它展开对将来经济的预测。所以B选项不入选。
麻烦解释一下B为什么是对的呀？
