问题如下图：
选项：
A. 
B. 
C. 
解释：
这道题有点绕。可以把decrease deficit看成是X-M不断变大吗？
NO.PZ2016010801000103 问题如下 The crease in tra surplus is most likely causeby: A.A crease of private savings over physiccapitinvesment. B.A crease of government spenng over trevenue. C.increase of net export. A is correct. The tra balanequation is X-M=(S-I)+(T-G)Tra surplus is when X-M 0, whiwill crease when private savings over physiccapitinvestment (X-M) is creasing or trevenue over goverment spenng (T-G) is creasing.考点贸易平衡方程式解析贸易平衡方程为X-M=(S-I)+(T-G)贸易顺差表示为X-M 0，私人储蓄相对于实物资本投资(S-I)减少或税收相对于政府支出(T-G)减少都会贸易顺差会减少。因此只有A正确。 如题
NO.PZ2016010801000103问题如下The crease in tra surplus is most likely causeby:A.A crease of private savings over physiccapitinvesment.B.A crease of government spenng over trevenue.C.increase of net export.A is correct. The tra balanequation is X-M=(S-I)+(T-G)Tra surplus is when X-M 0, whiwill crease when private savings over physiccapitinvestment (X-M) is creasing or trevenue over goverment spenng (T-G) is creasing.考点贸易平衡方程式解析贸易平衡方程为X-M=(S-I)+(T-G)贸易顺差表示为X-M 0，私人储蓄相对于实物资本投资(S-I)减少或税收相对于政府支出(T-G)减少都会贸易顺差会减少。因此只有A正确。题目问的是贸易盈余降低的原因，而不是贸易盈余的原因。？二者是不一样的
NO.PZ2016010801000103 老师这个 S+T+C=C+G+I+(X-M) 是最初始的式子吗 有点忘记了
NO.PZ2016010801000103 net export是怎么求出来的呢？第一反应以为X-M是出口减去进口，就是净出口...
私人储蓄相对于实物资本投资(S-I)减少——这是A 税收相对于政府支出(T-G)减少——这是B？不是吗？ 都会贸易顺差会减少。
