当税收由定量税改为比例税时，政府购买乘数减小。（）
参考答案：对
If the economy is in short-run disequilibrium below full employment, the most likely explanation is that: （）
A. aggregate demand has decreased.
B. long-run aggregate supply has decreased.
C. resource prices have decreased.
城市道路横断面设计原则是什么？
