问题如下图：
选项：
A. 
B. 
C. 
解释：
老师你好，这道题目的知识点怎么理解呢，谢谢解答
NO.PZ2018062003000114 问题如下 A client haskeyou to explain the fferences between potentiG anreG: A.Growth in potentiG measures how rapiy the toteconomy is expanng. B.If reG is below potentiG, the aggregate prilevel hwnwarpressure. C.If reG is below potentiG, the aggregate prilevel ten to rise. B is correct.Growth in reG measures how rapiy the toteconomy is expanng. If reG is below potentiG, the aggregate prilevel hwnwarpressure. If reG is above potentiG, the aggregate prilevel hupwarpressure.考点potentiG解析是真实G而非potentiG 能够准确衡量一国G的增长情况，所以A不入选。如果当前真实G小于potentiG ，表明该国当前经济不景气，物价就可能面临下行压力，所以B正确，而C错误。 potentiG是长期G，而reG是短期G，后者在前者之下按照讲义上的图来看，shortrun肯定是在longrun以下啊，为什么会有priwnwar趋势呢？请老师讲细一点
NO.PZ2018062003000114 问题如下 A client haskeyou to explain the fferences between potentiG anreG: A.Growth in potentiG measures how rapiy the toteconomy is expanng. B.If reG is below potentiG, the aggregate prilevel hwnwarpressure. C.If reG is below potentiG, the aggregate prilevel ten to rise. B is correct.Growth in reG measures how rapiy the toteconomy is expanng. If reG is below potentiG, the aggregate prilevel hwnwarpressure. If reG is above potentiG, the aggregate prilevel hupwarpressure.考点potentiG解析是真实G而非potentiG 能够准确衡量一国G的增长情况，所以A不入选。如果当前真实G小于potentiG ，表明该国当前经济不景气，物价就可能面临下行压力，所以B正确，而C错误。 potentig不是一个理论值吗？应该基本上所有国家的g都小于potentig吧，为什么是衰退？
NO.PZ2018062003000114问题如下A client haskeyou to explain the fferences between potentiG anreG:A.Growth in potentiG measures how rapiy the toteconomy is expanng.B.If reG is below potentiG, the aggregate prilevel hwnwarpressure.C.If reG is below potentiG, the aggregate prilevel ten to rise.B is correct.Growth in reG measures how rapiy the toteconomy is expanng. If reG is below potentiG, the aggregate prilevel hwnwarpressure. If reG is above potentiG, the aggregate prilevel hupwarpressure.考点potentiG解析是真实G而非potentiG 能够准确衡量一国G的增长情况，所以A不入选。如果当前真实G小于potentiG ，表明该国当前经济不景气，物价就可能面临下行压力，所以B正确，而C错误。 之前做题时遇到说AAS曲线的横轴代表reG，根据AS曲线的超短期，短期，长期三段，长期那里对应的才是potentiG，那么reG小于potentiG就意味着是AS曲线的前两段，即先不变再上升。麻烦老师看看这个逻辑到底哪里有问题呢？
NO.PZ2018062003000114 经济在长期会不会趋近于potentig呀？如果会的话那是不是说明经济会变好从而导致价格上涨？
NO.PZ2018062003000114 If reG is below potentiG, the aggregate prilevel hwnwarpressure. If reG is below potentiG, the aggregate prilevel ten to rise. B is correct. Growth in reG measures how rapiy the toteconomy is expanng. If reG is below potentiG, the aggregate prilevel hwnwarpressure. If reG is above potentiG, the aggregate prilevel hupwarpressure. 考点potentiG 解析是真实G而非potentiG 能够准确衡量一国G的增长情况，所以A不入选。 如果当前真实G小于potentiG ，表明该国当前经济不景气，物价就可能面临下行压力，所以B正确，而C错误。 经济不景气导致物价下行的可能，是如何推导出来的？
