NO.PZ2021052601000002
问题如下：
One of the reasons aggregate demand curve is downward sloping is because a lower price level means that the real exchange rate:
选项：
A.depreciates, making domestic goods cheaper in other countries and imports less competitive, resulting in a higher level of net exports.
B.appreciates, making domestic goods more expensive in other countries and imports more competitive, resulting in a higher level of net exports.
C.appreciates, making the country’s exports and imports less competitive and leading to lower net exports.
解释：
A is correct. A lower price level results in a weaker real exchange rate, making domestic goods cheaper to people in other countries and imports less competitive, resulting in a higher level of net exports.
较低的价格水平导致较弱的实际汇率，使国内产品对其他国家的人来说更便宜，进口竞争力下降，导致净出口水平上升。
如题，看了其他的答案，只有公式没有讲解，不太理解
