21. The LM curve has a:_
举一反三
- Monopoly maximizes its profit mainly rely on its ___. A: demand curve B: cost curve C: supply curve D: demand curve and cost curve
- AS曲线，AD曲线（AS curve，AD curve）
- The tracks of high-speed train must have a ________ A: longer curve radius B: shorter curve radius C: thinner curve radius D: wider curve radius
- An increase in labor productivity shifts the A: labor demand curve rightward. B: labor demand curve leftward. C: labor supply curve rightward. D: labor supply curve leftward
- If the Engel curve slopes up, then the demand curve slopes down.