<span style、"font-family: 宋体; font-size: small;"><span>流动性偏好</span></span>
<span style、"font-family: 宋体; font-size: small;"><span>收入和利率</span></span>
<span style、"font-family: 宋体; font-size: small;"><span>只有利率</span></span>
<span style、"font-family: 宋体; font-size: small;"><span>只有收入</span></span>