NO.PZ2018091701000020
问题如下：
Based on the following table：
Which Country has the highest real short-term interest rates?
选项：
A.
Country A
B.
Country B
C.
Country C
解释：
B is correct.
考点：Default-free interest rates and economic growth.
解析：关于default-free interest rates and economic growth 有2个结论：1，higher trend real economic growth, higher real default-free interest rates. 2, GDP growth is more volatile, real interest rates are higher.
这道题就是考察这2个结论的，国家A和B都有很高的GDP增长率，7.5%-4.9%=2.6%， 6%-3.4%=2.6%。所以再看GPD的波动，很明显国家B的波动最高，所以选B。
请问GDP增长率和通胀率为什么可以直接加减？
