A.7.5% B.8.5% C.17.6% D.19.2%
A.儲蓄是利率的遞增函數(shù) B.投資是利率的遞減函數(shù) C.儲蓄是利率的遞減函數(shù) D.投資是利率的遞增函數(shù) E.利率水平高低取決于投資與儲蓄的交互作用
A.9% B.10% C.11% D.20%